Mercurial Hosting > traffic-intelligence
annotate python/utils.py @ 671:849f5f8bf4b9
corrected other missing imports
author | Nicolas Saunier <nicolas.saunier@polymtl.ca> |
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date | Tue, 26 May 2015 11:40:32 +0200 |
parents | f72ed51c6b65 |
children | 5473b7460375 |
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1 #! /usr/bin/env python |
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2 ''' Generic utilities.''' |
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3 |
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4 import matplotlib.pyplot as plt |
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5 from datetime import time, datetime |
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6 from math import sqrt, ceil, floor |
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7 from scipy.stats import kruskal, shapiro |
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8 |
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9 datetimeFormat = "%Y-%m-%d %H:%M:%S" |
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10 |
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11 ######################### |
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12 # Enumerations |
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13 ######################### |
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14 |
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15 def inverseEnumeration(l): |
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16 'Returns the dictionary that provides for each element in the input list its index in the input list' |
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17 result = {} |
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18 for i,x in enumerate(l): |
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19 result[x] = i |
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20 return result |
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21 |
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22 ######################### |
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23 # Simple statistics |
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24 ######################### |
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25 |
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26 def sampleSize(stdev, tolerance, percentConfidence, printLatex = False): |
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27 from scipy.stats.distributions import norm |
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28 k = round(norm.ppf(0.5+percentConfidence/200., 0, 1)*100)/100. # 1.-(100-percentConfidence)/200. |
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29 if printLatex: |
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30 print('${0}^2\\frac{{{1}^2}}{{{2}^2}}$'.format(k, stdev, tolerance)) |
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31 return (k*stdev/tolerance)**2 |
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32 |
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33 def confidenceInterval(mean, stdev, nSamples, percentConfidence, trueStd = True, printLatex = False): |
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34 '''if trueStd, use normal distribution, otherwise, Student |
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35 |
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36 Use otherwise t.interval or norm.interval |
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37 ex: norm.interval(0.95, loc = 0., scale = 2.3/sqrt(11)) |
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38 t.interval(0.95, 10, loc=1.2, scale = 2.3/sqrt(nSamples)) |
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39 loc is mean, scale is sigma/sqrt(n) (for Student, 10 is df)''' |
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40 from scipy.stats.distributions import norm, t |
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41 if trueStd: |
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42 k = round(norm.ppf(0.5+percentConfidence/200., 0, 1)*100)/100. # 1.-(100-percentConfidence)/200. |
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43 else: # use Student |
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44 k = round(t.ppf(0.5+percentConfidence/200., nSamples-1)*100)/100. |
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45 e = k*stdev/sqrt(nSamples) |
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46 if printLatex: |
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47 print('${0} \pm {1}\\frac{{{2}}}{{\sqrt{{{3}}}}}$'.format(mean, k, stdev, nSamples)) |
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48 return mean-e, mean+e |
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49 |
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50 def computeChi2(expected, observed): |
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51 '''Returns the Chi2 statistics''' |
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52 result = 0. |
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53 for e, o in zip(expected, observed): |
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54 result += ((e-o)*(e-o))/e |
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55 return result |
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56 |
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57 class EmpiricalDistribution(object): |
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58 def nSamples(self): |
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59 return sum(self.counts) |
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60 |
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61 def cumulativeDensityFunction(sample, normalized = False): |
276 | 62 '''Returns the cumulative density function of the sample of a random variable''' |
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63 from numpy import arange, cumsum |
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64 xaxis = sorted(sample) |
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65 counts = arange(1,len(sample)+1) # dtype = float |
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66 if normalized: |
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67 counts /= float(len(sample)) |
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68 return xaxis, counts |
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69 |
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70 class EmpiricalDiscreteDistribution(EmpiricalDistribution): |
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71 '''Class to represent a sample of a distribution for a discrete random variable |
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72 ''' |
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73 from numpy.core.fromnumeric import sum |
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74 |
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75 def __init__(self, categories, counts): |
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76 self.categories = categories |
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77 self.counts = counts |
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78 |
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79 def mean(self): |
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80 result = [float(x*y) for x,y in zip(self.categories, self.counts)] |
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81 return sum(result)/self.nSamples() |
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82 |
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83 def var(self, mean = None): |
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84 if not mean: |
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85 m = self.mean() |
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86 else: |
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87 m = mean |
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88 result = 0. |
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89 squares = [float((x-m)*(x-m)*y) for x,y in zip(self.categories, self.counts)] |
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90 return sum(squares)/(self.nSamples()-1) |
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91 |
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92 def referenceCounts(self, probability): |
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93 '''probability is a function that returns the probability of the random variable for the category values''' |
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94 refProba = [probability(c) for c in self.categories] |
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95 refProba[-1] = 1-sum(refProba[:-1]) |
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96 refCounts = [r*self.nSamples() for r in refProba] |
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97 return refCounts, refProba |
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98 |
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99 class EmpiricalContinuousDistribution(EmpiricalDistribution): |
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100 '''Class to represent a sample of a distribution for a continuous random variable |
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101 with the number of observations for each interval |
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102 intervals (categories variable) are defined by their left limits, the last one being the right limit |
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103 categories contain therefore one more element than the counts''' |
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104 def __init__(self, categories, counts): |
276 | 105 # todo add samples for initialization and everything to None? (or setSamples?) |
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106 self.categories = categories |
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107 self.counts = counts |
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108 |
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109 def mean(self): |
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110 result = 0. |
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111 for i in range(len(self.counts)-1): |
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112 result += self.counts[i]*(self.categories[i]+self.categories[i+1])/2 |
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113 return result/self.nSamples() |
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114 |
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115 def var(self, mean = None): |
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116 if not mean: |
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117 m = self.mean() |
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118 else: |
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119 m = mean |
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120 result = 0. |
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121 for i in range(len(self.counts)-1): |
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122 mid = (self.categories[i]+self.categories[i+1])/2 |
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123 result += self.counts[i]*(mid - m)*(mid - m) |
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124 return result/(self.nSamples()-1) |
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125 |
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126 def referenceCounts(self, cdf): |
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127 '''cdf is a cumulative distribution function |
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128 returning the probability of the variable being less that x''' |
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129 # refCumulativeCounts = [0]#[cdf(self.categories[0][0])] |
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130 # for inter in self.categories: |
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131 # refCumulativeCounts.append(cdf(inter[1])) |
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132 refCumulativeCounts = [cdf(x) for x in self.categories[1:-1]] |
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133 |
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134 refProba = [refCumulativeCounts[0]] |
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135 for i in xrange(1,len(refCumulativeCounts)): |
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136 refProba.append(refCumulativeCounts[i]-refCumulativeCounts[i-1]) |
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137 refProba.append(1-refCumulativeCounts[-1]) |
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138 refCounts = [p*self.nSamples() for p in refProba] |
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139 |
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140 return refCounts, refProba |
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141 |
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142 def printReferenceCounts(self, refCounts=None): |
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143 if refCounts: |
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144 ref = refCounts |
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145 else: |
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146 ref = self.referenceCounts |
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147 for i in xrange(len(ref[0])): |
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148 print('{0}-{1} & {2:0.3} & {3:0.3} \\\\'.format(self.categories[i],self.categories[i+1],ref[1][i], ref[0][i])) |
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149 |
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150 |
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151 ######################### |
370
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152 # maths section |
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153 ######################### |
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154 |
433
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155 # def kernelSmoothing(sampleX, X, Y, weightFunc, halfwidth): |
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156 # '''Returns a smoothed weighted version of Y at the predefined values of sampleX |
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157 # Sum_x weight(sample_x,x) * y(x)''' |
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158 # from numpy import zeros, array |
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159 # smoothed = zeros(len(sampleX)) |
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160 # for i,x in enumerate(sampleX): |
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161 # weights = array([weightFunc(x,xx, halfwidth) for xx in X]) |
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162 # if sum(weights)>0: |
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163 # smoothed[i] = sum(weights*Y)/sum(weights) |
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164 # else: |
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165 # smoothed[i] = 0 |
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166 # return smoothed |
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167 |
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168 def kernelSmoothing(x, X, Y, weightFunc, halfwidth): |
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169 '''Returns the smoothed estimate of (X,Y) at x |
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170 Sum_x weight(sample_x,x) * y(x)''' |
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171 from numpy import zeros, array |
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172 weights = array([weightFunc(x,observedx, halfwidth) for observedx in X]) |
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173 if sum(weights)>0: |
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174 return sum(weights*Y)/sum(weights) |
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175 else: |
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176 return 0 |
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177 |
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178 def uniform(center, x, halfwidth): |
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179 if abs(center-x)<halfwidth: |
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180 return 1. |
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181 else: |
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182 return 0. |
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183 |
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184 def gaussian(center, x, halfwidth): |
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185 from numpy import exp |
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186 return exp(-((center-x)/halfwidth)**2/2) |
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187 |
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188 def epanechnikov(center, x, halfwidth): |
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189 diff = abs(center-x) |
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190 if diff<halfwidth: |
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191 return 1.-(diff/halfwidth)**2 |
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192 else: |
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193 return 0. |
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194 |
434 | 195 def triangular(center, x, halfwidth): |
196 diff = abs(center-x) | |
197 if diff<halfwidth: | |
198 return 1.-abs(diff/halfwidth) | |
199 else: | |
200 return 0. | |
433
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201 |
518
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202 def medianSmoothing(x, X, Y, halfwidth): |
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203 '''Returns the media of Y's corresponding to X's in the interval [x-halfwidth, x+halfwidth]''' |
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204 from numpy import median |
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205 return median([y for observedx, y in zip(X,Y) if abs(x-observedx)<halfwidth]) |
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206 |
521
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207 def argmaxDict(d): |
561
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208 return max(d, key=d.get) |
279
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209 |
395
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210 def framesToTime(nFrames, frameRate, initialTime = time()): |
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211 '''returns a datetime.time for the time in hour, minutes and seconds |
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212 initialTime is a datetime.time''' |
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213 seconds = int(floor(float(nFrames)/float(frameRate))+initialTime.hour*3600+initialTime.minute*60+initialTime.second) |
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214 h = int(floor(seconds/3600.)) |
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215 seconds = seconds - h*3600 |
261
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216 m = int(floor(seconds/60)) |
248
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217 seconds = seconds - m*60 |
262
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218 return time(h, m, seconds) |
248
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219 |
381
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220 def timeToFrames(t, frameRate): |
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221 return frameRate*(t.hour*3600+t.minute*60+t.second) |
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222 |
241
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223 def sortXY(X,Y): |
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224 'returns the sorted (x, Y(x)) sorted on X' |
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225 D = {} |
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226 for x, y in zip(X,Y): |
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227 D[x]=y |
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228 xsorted = sorted(D.keys()) |
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229 return xsorted, [D[x] for x in xsorted] |
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230 |
32 | 231 def ceilDecimals(v, nDecimals): |
232 '''Rounds the number at the nth decimal | |
233 eg 1.23 at 0 decimal is 2, at 1 decimal is 1.3''' | |
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234 tens = 10**nDecimals |
32 | 235 return ceil(v*tens)/tens |
236 | |
152
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237 def inBetween(bound1, bound2, x): |
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238 return bound1 <= x <= bound2 or bound2 <= x <= bound1 |
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239 |
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240 def pointDistanceL2(x1,y1,x2,y2): |
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241 ''' Compute point-to-point distance (L2 norm, ie Euclidean distance)''' |
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242 return sqrt((x2-x1)**2+(y2-y1)**2) |
24
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243 |
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244 def crossProduct(l1, l2): |
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245 return l1[0]*l2[1]-l1[1]*l2[0] |
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246 |
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247 def cat_mvgavg(cat_list, halfWidth): |
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248 ''' Return a list of categories/values smoothed according to a window. |
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249 halfWidth is the search radius on either side''' |
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250 from copy import deepcopy |
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251 smoothed = deepcopy(cat_list) |
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252 for point in range(len(cat_list)): |
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253 lower_bound_check = max(0,point-halfWidth) |
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254 upper_bound_check = min(len(cat_list)-1,point+halfWidth+1) |
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255 window_values = cat_list[lower_bound_check:upper_bound_check] |
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256 smoothed[point] = max(set(window_values), key=window_values.count) |
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257 return smoothed |
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258 |
547 | 259 def filterMovingWindow(inputSignal, halfWidth): |
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260 '''Returns an array obtained after the smoothing of the input by a moving average |
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261 The first and last points are copied from the original.''' |
547 | 262 from numpy import ones,convolve,array |
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263 width = float(halfWidth*2+1) |
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264 win = ones(width,'d') |
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265 result = convolve(win/width,array(inputSignal),'same') |
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266 result[:halfWidth] = inputSignal[:halfWidth] |
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267 result[-halfWidth:] = inputSignal[-halfWidth:] |
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268 return result |
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269 |
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270 def linearRegression(x, y, deg = 1, plotData = False): |
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271 '''returns the least square estimation of the linear regression of y = ax+b |
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272 as well as the plot''' |
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273 from numpy.lib.polynomial import polyfit |
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274 from numpy.core.multiarray import arange |
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275 coef = polyfit(x, y, deg) |
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276 if plotData: |
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277 def poly(x): |
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278 result = 0 |
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279 for i in range(len(coef)): |
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280 result += coef[i]*x**(len(coef)-i-1) |
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281 return result |
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282 plt.plot(x, y, 'x') |
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283 xx = arange(min(x), max(x),(max(x)-min(x))/1000) |
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284 plt.plot(xx, [poly(z) for z in xx]) |
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285 return coef |
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286 |
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287 def correlation(data, correlationMethod = 'pearson', plotFigure = False, displayNames = None, figureFilename = None): |
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288 '''Computes (and displays) the correlation matrix for a pandas DataFrame''' |
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289 c=data.corr(correlationMethod) |
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290 if plotFigure: |
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291 fig = plt.figure(figsize=(2+0.4*c.shape[0], 0.4*c.shape[0])) |
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292 fig.add_subplot(1,1,1) |
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293 #plt.imshow(np.fabs(c), interpolation='none') |
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294 plt.imshow(c, vmin=-1., vmax = 1., interpolation='none', cmap = 'RdYlBu_r') # coolwarm |
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295 colnames = [displayNames.get(s.strip(), s.strip()) for s in c.columns.tolist()] |
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296 #correlation.plot_corr(c, xnames = colnames, normcolor=True, title = filename) |
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297 plt.xticks(range(len(colnames)), colnames, rotation=90) |
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298 plt.yticks(range(len(colnames)), colnames) |
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299 plt.tick_params('both', length=0) |
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300 plt.subplots_adjust(bottom = 0.29) |
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301 plt.colorbar() |
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302 plt.title('Correlation ({})'.format(correlationMethod)) |
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303 plt.tight_layout() |
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304 if figureFilename is not None: |
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305 plt.savefig(figureFilename, dpi = 150, transparent = True) |
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306 return c |
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307 |
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308 def addDummies(data, variables, allVariables = True): |
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309 '''Add binary dummy variables for each value of a nominal variable |
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310 in a pandas DataFrame''' |
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311 from numpy import NaN, dtype |
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312 newVariables = [] |
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313 for var in variables: |
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314 if var in data.columns and data.dtypes[var] == dtype('O') and len(data[var].unique()) > 2: |
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315 values = data[var].unique() |
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316 if not allVariables: |
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317 values = values[:-1] |
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318 for val in values: |
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319 if val is not NaN: |
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320 newVariable = (var+'_{}'.format(val)).replace('.','').replace(' ','').replace('-','') |
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321 data[newVariable] = (data[var] == val) |
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322 newVariables.append(newVariable) |
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323 return newVariables |
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324 |
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325 def kruskalWallis(data, dependentVariable, independentVariable, plotFigure = False, figureFilenamePrefix = None, figureFileType = 'pdf'): |
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326 '''Studies the influence of (nominal) independent variable over the dependent variable |
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327 |
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328 Makes tests if the conditional distributions are normal |
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329 using the Shapiro-Wilk test (in which case ANOVA could be used) |
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330 Implements uses the non-parametric Kruskal Wallis test''' |
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331 tmp = data[data[independentVariable].notnull()] |
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332 independentVariableValues = sorted(tmp[independentVariable].unique().tolist()) |
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333 if len(independentVariableValues) >= 2: |
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334 for x in independentVariableValues: |
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335 print('Shapiro-Wilk normality test for {} when {}={}: {} obs'.format(dependentVariable,independentVariable, x, len(tmp.loc[tmp[independentVariable] == x, dependentVariable]))) |
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336 if len(tmp.loc[tmp[independentVariable] == x, dependentVariable]) >= 3: |
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337 print shapiro(tmp.loc[tmp[independentVariable] == x, dependentVariable]) |
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338 if plotFigure: |
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339 plt.figure() |
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340 plt.boxplot([tmp.loc[tmp[independentVariable] == x, dependentVariable] for x in independentVariableValues]) |
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341 #q25, q75 = tmp[dependentVariable].quantile([.25, .75]) |
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342 #plt.ylim(ymax = q75+1.5*(q75-q25)) |
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343 plt.xticks(range(1,len(independentVariableValues)+1), independentVariableValues) |
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344 plt.title('{} vs {}'.format(dependentVariable, independentVariable)) |
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345 if figureFilenamePrefix is not None: |
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346 plt.savefig(figureFilenamePrefix+'{}-{}.{}'.format(dependentVariable, independentVariable, figureFileType)) |
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347 #else: |
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348 # TODO formatter le tableau (html?) |
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349 print tmp.groupby([independentVariable])[dependentVariable].describe().unstack().sort(['50%'], ascending = False) |
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350 return kruskal(*[tmp.loc[tmp[independentVariable] == x, dependentVariable] for x in independentVariableValues]) |
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351 else: |
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352 return None |
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353 |
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354 def prepareRegression(data, dependentVariable, independentVariables, maxCorrelationThreshold, correlations, maxCorrelationP, correlationFunc): |
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355 '''Removes variables from candidate independent variables if |
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356 - if two independent variables are correlated (> maxCorrelationThreshold), one is removed |
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357 - if an independent variable is not correlated with the dependent variable (p>maxCorrelationP) |
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358 Returns the remaining non-correlated variables, correlated with the dependent variable |
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359 |
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360 correlationFunc is spearmanr or pearsonr from scipy.stats |
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361 |
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362 TODO: pass the dummies for nominal variables and remove if all dummies are correlated, or none is correlated with the dependentvariable''' |
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363 from numpy import dtype |
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364 from copy import copy |
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365 result = copy(independentVariables) |
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366 for v1 in independentVariables: |
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367 if v1 in correlations.index: |
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368 for v2 in independentVariables: |
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369 if v2 != v1 and v2 in correlations.index: |
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370 if abs(correlations.loc[v1, v2]) > maxCorrelationThreshold: |
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371 if v1 in result and v2 in result: |
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372 print('Removing {} (correlation {} with {})'.format(v2, correlations.loc[v1, v2], v1)) |
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373 result.remove(v2) |
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374 #regressionIndependentVariables = result |
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375 for var in copy(result): |
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376 if data.dtypes[var] != dtype('O'): |
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377 cor, p = correlationFunc(data[dependentVariable], data[var]) |
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378 if p > maxCorrelationP: |
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379 print('Removing {} (no correlation p={})'.format(var, p)) |
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380 result.remove(var) |
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381 return result |
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382 |
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383 |
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384 ######################### |
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385 # regression analysis using statsmodels (and pandas) |
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386 ######################### |
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387 |
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388 # TODO make class for experiments? |
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389 # TODO add tests with public dataset downloaded from Internet (IRIS et al) |
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390 def modelString(experiment, dependentVariable, independentVariables): |
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391 return dependentVariable+' ~ '+' + '.join([independentVariable for independentVariable in independentVariables if experiment[independentVariable]]) |
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392 |
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393 def runModel(experiment, data, dependentVariable, independentVariables, regressionType = 'ols'): |
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394 import statsmodels.formula.api as smf |
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395 modelStr = modelString(experiment, dependentVariable, independentVariables) |
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396 if regressionType == 'ols': |
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397 model = smf.ols(modelStr, data = data) |
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398 elif regressionType == 'gls': |
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399 model = smf.gls(modelStr, data = data) |
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400 elif regressionType == 'rlm': |
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401 model = smf.rlm(modelStr, data = data) |
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402 else: |
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403 print('Unknown regression type {}. Exiting'.format(regressionType)) |
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404 import sys |
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405 sys.exit() |
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406 return model.fit() |
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407 |
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408 def runModels(experiments, data, dependentVariable, independentVariables, regressionType = 'ols'): |
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409 '''Runs several models and stores 3 statistics |
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410 adjusted R2, condition number (should be small, eg < 1000) |
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411 and p-value for Shapiro-Wilk test of residual normality''' |
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412 for i,experiment in experiments.iterrows(): |
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413 if experiment[independentVariables].any(): |
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414 results = runModel(experiment, data, dependentVariable, independentVariables, regressionType = 'ols') |
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415 experiments.loc[i,'r2adj'] = results.rsquared_adj |
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416 experiments.loc[i,'condNum'] = results.condition_number |
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417 experiments.loc[i, 'shapiroP'] = shapiro(results.resid)[1] |
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418 experiments.loc[i,'nobs'] = int(results.nobs) |
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419 return experiments |
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420 |
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421 def generateExperiments(independentVariables): |
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422 '''Generates all possible models for including or not each independent variable''' |
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423 from numpy import nan |
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424 from pandas import DataFrame |
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425 experiments = {} |
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426 nIndependentVariables = len(independentVariables) |
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428 print("Duplicate variables. Exiting") |
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429 import sys |
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430 sys.exit() |
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431 nModels = 2**nIndependentVariables |
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432 for i,var in enumerate(independentVariables): |
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433 pattern = [False]*(2**i)+[True]*(2**i) |
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434 experiments[var] = pattern*(2**(nIndependentVariables-i-1)) |
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435 experiments = DataFrame(experiments) |
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436 experiments['r2adj'] = 0. |
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437 experiments['condNum'] = nan |
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438 experiments['shapiroP'] = -1 |
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439 experiments['nobs'] = -1 |
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440 return experiments |
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441 |
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442 def findBestModel(data, dependentVariable, independentVariables, regressionType = 'ols', nProcesses = 1): |
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443 '''Generates all possible model with the independentVariables |
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444 and runs them, saving the results in experiments |
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445 with multiprocess option''' |
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446 from pandas import concat |
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447 from multiprocessing import Pool |
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448 experiments = generateExperiments(independentVariables) |
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449 nModels = len(experiments) |
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450 print("Running {} models with {} processes".format(nModels, nProcesses)) |
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451 if nProcesses == 1: |
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452 return runModels(experiments, data, dependentVariable, independentVariables, regressionType) |
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453 else: |
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454 pool = Pool(processes = nProcesses) |
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455 chunkSize = int(ceil(nModels/nProcesses)) |
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456 jobs = [pool.apply_async(runModels, args = (experiments[i*chunkSize:(i+1)*chunkSize], data, dependentVariable, independentVariables, regressionType)) for i in range(nProcesses)] |
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457 return concat([job.get() for job in jobs]) |
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458 |
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459 def findBestModelFwd(data, dependentVariable, independentVariables, modelFunc, experiments = None): |
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460 '''Forward search for best model (based on adjusted R2) |
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461 Randomly starting with one variable and adding randomly variables |
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462 if they improve the model |
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463 |
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464 The results are added to experiments if provided as argument |
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465 Storing in experiment relies on the index being the number equal |
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466 to the binary code derived from the independent variables''' |
670
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467 from numpy.random import permutation as nppermutation |
667
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468 if experiments is None: |
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469 experiments = generateExperiments(independentVariables) |
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470 nIndependentVariables = len(independentVariables) |
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471 permutation = nppermutation(range(nIndependentVariables)).tolist() |
667
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472 variableMapping = {j: independentVariables[i] for i,j in enumerate(permutation)} |
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473 print('Tested variables '+', '.join([variableMapping[i] for i in xrange(nIndependentVariables)])) |
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474 bestModel = [False]*nIndependentVariables |
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475 currentVarNum = 0 |
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476 currentR2Adj = 0. |
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477 for currentVarNum in xrange(nIndependentVariables): |
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478 currentModel = [i for i in bestModel] |
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479 currentModel[currentVarNum] = True |
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480 rowIdx = sum([0]+[2**i for i in xrange(nIndependentVariables) if currentModel[permutation[i]]]) |
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481 #print currentVarNum, sum(currentModel), ', '.join([independentVariables[i] for i in xrange(nIndependentVariables) if currentModel[permutation[i]]]) |
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482 if experiments.loc[rowIdx, 'shapiroP'] < 0: |
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483 modelStr = modelString(experiments.loc[rowIdx], dependentVariable, independentVariables) |
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484 model = modelFunc(modelStr, data = data) |
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485 results = model.fit() |
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486 experiments.loc[rowIdx, 'r2adj'] = results.rsquared_adj |
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487 experiments.loc[rowIdx, 'condNum'] = results.condition_number |
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488 experiments.loc[rowIdx, 'shapiroP'] = shapiro(results.resid)[1] |
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489 experiments.loc[rowIdx, 'nobs'] = int(results.nobs) |
667
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490 if currentR2Adj < experiments.loc[rowIdx, 'r2adj']: |
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491 currentR2Adj = experiments.loc[rowIdx, 'r2adj'] |
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492 bestModel[currentVarNum] = True |
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493 return experiments |
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494 |
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495 def displayModelResults(results, model = None): |
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496 import statsmodels.api as sm |
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497 '''Displays some model results''' |
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498 print results.summary() |
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499 print('Shapiro-Wilk normality test for residuals: {}'.format(shapiro(results.resid))) |
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500 if model is not None: |
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501 plt.figure() |
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502 plt.plot(results.predict(), model.endog, 'x') |
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503 x=plt.xlim() |
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504 y=plt.ylim() |
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505 plt.plot([max(x[0], y[0]), min(x[1], y[1])], [max(x[0], y[0]), min(x[1], y[1])], 'r') |
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506 plt.title('true vs predicted') |
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507 plt.figure() |
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508 plt.plot(results.predict(), results.resid, 'x') |
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509 plt.title('residuals vs predicted') |
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510 sm.qqplot(results.resid, fit = True, line = '45') |
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511 |
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512 |
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513 ######################### |
455
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514 # iterable section |
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515 ######################### |
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516 |
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517 def mostCommon(L): |
456 | 518 '''Returns the most frequent element in a iterable |
519 | |
520 taken from http://stackoverflow.com/questions/1518522/python-most-common-element-in-a-list''' | |
455
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521 from itertools import groupby |
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522 from operator import itemgetter |
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523 # get an iterable of (item, iterable) pairs |
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524 SL = sorted((x, i) for i, x in enumerate(L)) |
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525 # print 'SL:', SL |
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526 groups = groupby(SL, key=itemgetter(0)) |
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527 # auxiliary function to get "quality" for an item |
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528 def _auxfun(g): |
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529 item, iterable = g |
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530 count = 0 |
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531 min_index = len(L) |
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532 for _, where in iterable: |
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533 count += 1 |
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534 min_index = min(min_index, where) |
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535 # print 'item %r, count %r, minind %r' % (item, count, min_index) |
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536 return count, -min_index |
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537 # pick the highest-count/earliest item |
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538 return max(groups, key=_auxfun)[0] |
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|
539 |
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540 ######################### |
370
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541 # sequence section |
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542 ######################### |
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|
543 |
665
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544 class LCSS(object): |
370
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545 '''Class that keeps the LCSS parameters |
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546 and puts together the various computations''' |
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547 def __init__(self, similarityFunc, delta = float('inf'), aligned = False, lengthFunc = min): |
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548 self.similarityFunc = similarityFunc |
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549 self.aligned = aligned |
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550 self.delta = delta |
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551 self.lengthFunc = lengthFunc |
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diff
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552 self.subSequenceIndices = [(0,0)] |
370
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553 |
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554 def similarities(self, l1, l2, jshift=0): |
370
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555 from numpy import zeros, int as npint |
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|
556 n1 = len(l1) |
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557 n2 = len(l2) |
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558 self.similarityTable = zeros((n1+1,n2+1), dtype = npint) |
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559 for i in xrange(1,n1+1): |
374
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diff
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560 for j in xrange(max(1,i-jshift-self.delta),min(n2,i-jshift+self.delta)+1): |
370
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561 if self.similarityFunc(l1[i-1], l2[j-1]): |
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562 self.similarityTable[i,j] = self.similarityTable[i-1,j-1]+1 |
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563 else: |
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564 self.similarityTable[i,j] = max(self.similarityTable[i-1,j], self.similarityTable[i,j-1]) |
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565 |
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566 def subSequence(self, i, j): |
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567 '''Returns the subsequence of two sequences |
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568 http://en.wikipedia.org/wiki/Longest_common_subsequence_problem''' |
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569 if i == 0 or j == 0: |
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570 return [] |
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571 elif self.similarityTable[i][j] == self.similarityTable[i][j-1]: |
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572 return self.subSequence(i, j-1) |
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573 elif self.similarityTable[i][j] == self.similarityTable[i-1][j]: |
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574 return self.subSequence(i-1, j) |
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575 else: |
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576 return self.subSequence(i-1, j-1) + [(i-1,j-1)] |
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577 |
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578 def _compute(self, _l1, _l2, computeSubSequence = False): |
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579 '''returns the longest common subsequence similarity |
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580 based on the threshold on distance between two elements of lists l1, l2 |
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581 similarityFunc returns True or False whether the two points are considered similar |
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582 |
607 | 583 if aligned, returns the best matching if using a finite delta by shifting the series alignments |
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584 |
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585 eg distance(p1, p2) < epsilon |
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586 ''' |
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587 if len(_l2) < len(_l1): # l1 is the shortest |
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588 l1 = _l2 |
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589 l2 = _l1 |
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590 revertIndices = True |
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591 else: |
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592 l1 = _l1 |
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593 l2 = _l2 |
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594 revertIndices = False |
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595 n1 = len(l1) |
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596 n2 = len(l2) |
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597 |
370
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598 if self.aligned: |
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599 lcssValues = {} |
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600 similarityTables = {} |
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601 for i in xrange(-n2-self.delta+1, n1+self.delta): # interval such that [i-shift-delta, i-shift+delta] is never empty, which happens when i-shift+delta < 1 or when i-shift-delta > n2 |
373
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602 self.similarities(l1, l2, i) |
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603 lcssValues[i] = self.similarityTable.max() |
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604 similarityTables[i] = self.similarityTable |
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605 #print self.similarityTable |
521
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606 alignmentShift = argmaxDict(lcssValues) # ideally get the medium alignment shift, the one that minimizes distance |
389
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607 self.similarityTable = similarityTables[alignmentShift] |
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608 else: |
389
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609 alignmentShift = 0 |
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610 self.similarities(l1, l2) |
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611 |
374
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612 # threshold values for the useful part of the similarity table are n2-n1-delta and n1-n2-delta |
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613 self.similarityTable = self.similarityTable[:min(n1, n2+alignmentShift+self.delta)+1, :min(n2, n1-alignmentShift+self.delta)+1] |
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614 |
372
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615 if computeSubSequence: |
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616 self.subSequenceIndices = self.subSequence(self.similarityTable.shape[0]-1, self.similarityTable.shape[1]-1) |
371
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617 if revertIndices: |
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618 self.subSequenceIndices = [(j,i) for i,j in self.subSequenceIndices] |
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619 return self.similarityTable[-1,-1] |
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620 |
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621 def compute(self, l1, l2, computeSubSequence = False): |
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622 '''get methods are to be shadowed in child classes ''' |
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623 return self._compute(l1, l2, computeSubSequence) |
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624 |
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625 def computeAlignment(self): |
370
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626 from numpy import mean |
374
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627 return mean([j-i for i,j in self.subSequenceIndices]) |
370
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628 |
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629 def _computeNormalized(self, l1, l2, computeSubSequence = False): |
370
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630 ''' compute the normalized LCSS |
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631 ie, the LCSS divided by the min or mean of the indicator lengths (using lengthFunc) |
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632 lengthFunc = lambda x,y:float(x,y)/2''' |
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633 return float(self._compute(l1, l2, computeSubSequence))/self.lengthFunc(len(l1), len(l2)) |
370
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634 |
376
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635 def computeNormalized(self, l1, l2, computeSubSequence = False): |
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636 return self._computeNormalized(l1, l2, computeSubSequence) |
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637 |
376
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638 def _computeDistance(self, l1, l2, computeSubSequence = False): |
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639 ''' compute the LCSS distance''' |
376
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640 return 1-self._computeNormalized(l1, l2, computeSubSequence) |
370
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641 |
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642 def computeDistance(self, l1, l2, computeSubSequence = False): |
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643 return self._computeDistance(l1, l2, computeSubSequence) |
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644 |
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645 ######################### |
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646 # plotting section |
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647 ######################### |
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648 |
332
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649 def plotPolygon(poly, options = ''): |
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650 'Plots shapely polygon poly' |
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651 from numpy.core.multiarray import array |
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652 from matplotlib.pyplot import plot |
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653 from shapely.geometry import Polygon |
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654 |
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655 tmp = array(poly.exterior) |
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656 plot(tmp[:,0], tmp[:,1], options) |
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657 |
324 | 658 def stepPlot(X, firstX, lastX, initialCount = 0, increment = 1): |
659 '''for each value in X, increment by increment the initial count | |
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660 returns the lists that can be plotted |
324 | 661 to obtain a step plot increasing by one for each value in x, from first to last value |
662 firstX and lastX should be respectively smaller and larger than all elements in X''' | |
297
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663 |
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664 sortedX = [] |
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665 counts = [initialCount] |
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666 for x in sorted(X): |
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667 sortedX += [x,x] |
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668 counts.append(counts[-1]) |
324 | 669 counts.append(counts[-1]+increment) |
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670 counts.append(counts[-1]) |
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671 return [firstX]+sortedX+[lastX], counts |
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672 |
665
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|
673 class PlottingPropertyValues(object): |
45
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674 def __init__(self, values): |
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675 self.values = values |
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676 |
116
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677 def __getitem__(self, i): |
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678 return self.values[i%len(self.values)] |
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679 |
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680 markers = PlottingPropertyValues(['+', '*', ',', '.', 'x', 'D', 's', 'o']) |
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681 scatterMarkers = PlottingPropertyValues(['s','o','^','>','v','<','d','p','h','8','+','x']) |
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682 |
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683 linestyles = PlottingPropertyValues(['-', '--', '-.', ':']) |
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684 |
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685 colors = PlottingPropertyValues('brgmyck') # 'w' |
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686 |
115
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687 def plotIndicatorMap(indicatorMap, squareSize, masked = True, defaultValue=-1): |
65
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688 from numpy import array, arange, ones, ma |
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689 from matplotlib.pyplot import pcolor |
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Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
48
diff
changeset
|
690 coords = array(indicatorMap.keys()) |
75cf537b8d88
moved and generalized map making functions to the library
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
48
diff
changeset
|
691 minX = min(coords[:,0]) |
75cf537b8d88
moved and generalized map making functions to the library
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
48
diff
changeset
|
692 minY = min(coords[:,1]) |
75cf537b8d88
moved and generalized map making functions to the library
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
48
diff
changeset
|
693 X = arange(minX, max(coords[:,0])+1.1)*squareSize |
75cf537b8d88
moved and generalized map making functions to the library
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
48
diff
changeset
|
694 Y = arange(minY, max(coords[:,1])+1.1)*squareSize |
115
550556378466
added functionalities to indicator maps
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
86
diff
changeset
|
695 C = defaultValue*ones((len(Y), len(X))) |
65
75cf537b8d88
moved and generalized map making functions to the library
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
48
diff
changeset
|
696 for k,v in indicatorMap.iteritems(): |
75cf537b8d88
moved and generalized map making functions to the library
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
48
diff
changeset
|
697 C[k[1]-minY,k[0]-minX] = v |
115
550556378466
added functionalities to indicator maps
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
86
diff
changeset
|
698 if masked: |
550556378466
added functionalities to indicator maps
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
86
diff
changeset
|
699 pcolor(X, Y, ma.masked_where(C==defaultValue,C)) |
550556378466
added functionalities to indicator maps
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
86
diff
changeset
|
700 else: |
550556378466
added functionalities to indicator maps
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
86
diff
changeset
|
701 pcolor(X, Y, C) |
65
75cf537b8d88
moved and generalized map making functions to the library
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
48
diff
changeset
|
702 |
45
74d2de078baf
added colors, linestyles and markers to pick from
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
42
diff
changeset
|
703 ######################### |
637
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
704 # Data download |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
705 ######################### |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
706 |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
707 def downloadECWeather(stationID, years, months = [], outputDirectoryname = '.', english = True): |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
708 '''Downloads monthly weather data from Environment Canada |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
709 If month is provided (number 1 to 12), it means hourly data for the whole month |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
710 Otherwise, means the data for each day, for the whole year |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
711 |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
712 Example: MONTREAL MCTAVISH 10761 |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
713 MONTREALPIERRE ELLIOTT TRUDEAU INTL A 5415 |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
714 |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
715 To get daily data for 2010 and 2011, downloadECWeather(10761, [2010,2011], [], '/tmp') |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
716 To get hourly data for 2009 and 2012, January, March and October, downloadECWeather(10761, [2009,2012], [1,3,10], '/tmp')''' |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
717 import urllib2 |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
718 if english: |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
719 language = 'e' |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
720 else: |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
721 language = 'f' |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
722 if len(months) == 0: |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
723 timeFrame = 2 |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
724 months = [1] |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
725 else: |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
726 timeFrame = 1 |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
727 |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
728 for year in years: |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
729 for month in months: |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
730 url = urllib2.urlopen('http://climat.meteo.gc.ca/climateData/bulkdata_{}.html?format=csv&stationID={}&Year={}&Month={}&Day=1&timeframe={}&submit=++T%C3%A9l%C3%A9charger+%0D%0Ades+donn%C3%A9es'.format(language, stationID, year, month, timeFrame)) |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
731 data = url.read() |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
732 outFilename = '{}/{}-{}'.format(outputDirectoryname, stationID, year) |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
733 if timeFrame == 1: |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
734 outFilename += '-{}-hourly'.format(month) |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
735 else: |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
736 outFilename += '-daily' |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
737 outFilename += '.csv' |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
738 out = open(outFilename, 'w') |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
739 out.write(data) |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
740 out.close() |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
741 |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
742 ######################### |
c9a0b72979fd
added function to get canadian public weather data
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
615
diff
changeset
|
743 # File I/O |
27
44689029a86f
updated segmentIntersection and other
Nicolas Saunier <nico@confins.net>
parents:
24
diff
changeset
|
744 ######################### |
24
6fb59cfb201e
first version of segmentIntersection
Nicolas Saunier <nico@confins.net>
parents:
19
diff
changeset
|
745 |
0
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
746 def removeExtension(filename, delimiter = '.'): |
31
c000f37c316d
moved tests to independent file, added chi2 computation
Nicolas Saunier <nico@confins.net>
parents:
29
diff
changeset
|
747 '''Returns the filename minus the extension (all characters after last .)''' |
0
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
748 i = filename.rfind(delimiter) |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
749 if i>0: |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
750 return filename[:i] |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
751 else: |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
752 return filename |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
753 |
46
b5d007612e16
added filename util
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
45
diff
changeset
|
754 def cleanFilename(s): |
b5d007612e16
added filename util
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
45
diff
changeset
|
755 'cleans filenames obtained when contatenating figure characteristics' |
266
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
756 return s.replace(' ','-').replace('.','').replace('/','-') |
46
b5d007612e16
added filename util
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
45
diff
changeset
|
757 |
0
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
758 def listfiles(dirname, extension, remove = False): |
14
e7bbe8465591
homography and other utils
Nicolas Saunier <nico@confins.net>
parents:
7
diff
changeset
|
759 '''Returns the list of files with the extension in the directory dirname |
e7bbe8465591
homography and other utils
Nicolas Saunier <nico@confins.net>
parents:
7
diff
changeset
|
760 If remove is True, the filenames are stripped from the extension''' |
0
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
761 from os import listdir |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
762 tmp = [f for f in listdir(dirname) if f.endswith(extension)] |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
763 tmp.sort() |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
764 if remove: |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
765 return [removeExtension(f, extension) for f in tmp] |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
766 else: |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
767 return tmp |
aed8eb63cdde
initial commit with non-functional python code for NGSIM
Nicolas Saunier <nico@confins.net>
parents:
diff
changeset
|
768 |
266
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
769 def mkdir(dirname): |
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
770 'Creates a directory if it does not exist' |
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
771 import os |
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
772 if not os.path.exists(dirname): |
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
773 os.mkdir(dirname) |
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
774 else: |
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
775 print(dirname+' already exists') |
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
776 |
14
e7bbe8465591
homography and other utils
Nicolas Saunier <nico@confins.net>
parents:
7
diff
changeset
|
777 def removeFile(filename): |
e7bbe8465591
homography and other utils
Nicolas Saunier <nico@confins.net>
parents:
7
diff
changeset
|
778 '''Deletes the file while avoiding raising an error |
e7bbe8465591
homography and other utils
Nicolas Saunier <nico@confins.net>
parents:
7
diff
changeset
|
779 if the file does not exist''' |
266
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
780 import os |
14
e7bbe8465591
homography and other utils
Nicolas Saunier <nico@confins.net>
parents:
7
diff
changeset
|
781 if (os.path.exists(filename)): |
e7bbe8465591
homography and other utils
Nicolas Saunier <nico@confins.net>
parents:
7
diff
changeset
|
782 os.remove(filename) |
266
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
783 else: |
aba9711b3149
small modificatons and reorganization
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
262
diff
changeset
|
784 print(filename+' does not exist') |
14
e7bbe8465591
homography and other utils
Nicolas Saunier <nico@confins.net>
parents:
7
diff
changeset
|
785 |
42
1a2ac2d4f53a
added loading of the rest of the data for objects
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
35
diff
changeset
|
786 def line2Floats(l, separator=' '): |
1a2ac2d4f53a
added loading of the rest of the data for objects
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
35
diff
changeset
|
787 '''Returns the list of floats corresponding to the string''' |
1a2ac2d4f53a
added loading of the rest of the data for objects
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
35
diff
changeset
|
788 return [float(x) for x in l.split(separator)] |
1a2ac2d4f53a
added loading of the rest of the data for objects
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
35
diff
changeset
|
789 |
1a2ac2d4f53a
added loading of the rest of the data for objects
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
35
diff
changeset
|
790 def line2Ints(l, separator=' '): |
1a2ac2d4f53a
added loading of the rest of the data for objects
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
35
diff
changeset
|
791 '''Returns the list of ints corresponding to the string''' |
1a2ac2d4f53a
added loading of the rest of the data for objects
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
35
diff
changeset
|
792 return [int(x) for x in l.split(separator)] |
31
c000f37c316d
moved tests to independent file, added chi2 computation
Nicolas Saunier <nico@confins.net>
parents:
29
diff
changeset
|
793 |
c000f37c316d
moved tests to independent file, added chi2 computation
Nicolas Saunier <nico@confins.net>
parents:
29
diff
changeset
|
794 ######################### |
332
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
795 # CLI utils |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
796 ######################### |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
797 |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
798 def parseCLIOptions(helpMessage, options, cliArgs, optionalOptions=[]): |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
799 ''' Simple function to handle similar argument parsing |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
800 Returns the dictionary of options and their values |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
801 |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
802 * cliArgs are most likely directly sys.argv |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
803 (only the elements after the first one are considered) |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
804 |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
805 * options should be a list of strings for getopt options, |
a6ca86107f27
reorganized utils module
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
324
diff
changeset
|
806 eg ['frame=','correspondences=','video='] |
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807 A value must be provided for each option, or the program quits''' |
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808 import sys, getopt |
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809 from numpy.core.fromnumeric import all |
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810 optionValues, args = getopt.getopt(cliArgs[1:], 'h', ['help']+options+optionalOptions) |
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811 optionValues = dict(optionValues) |
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812 |
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813 if '--help' in optionValues.keys() or '-h' in optionValues.keys(): |
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814 print(helpMessage+ |
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815 '\n - Compulsory options: '+' '.join([opt.replace('=','') for opt in options])+ |
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816 '\n - Non-compulsory options: '+' '.join([opt.replace('=','') for opt in optionalOptions])) |
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817 sys.exit() |
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818 |
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819 missingArgument = [('--'+opt.replace('=','') in optionValues.keys()) for opt in options] |
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820 if not all(missingArgument): |
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821 print('Missing argument') |
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822 print(optionValues) |
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823 sys.exit() |
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824 |
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825 return optionValues |
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826 |
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827 |
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828 ######################### |
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829 # Profiling |
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830 ######################### |
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831 |
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832 def analyzeProfile(profileFilename, stripDirs = True): |
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833 '''Analyze the file produced by cProfile |
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834 |
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835 obtained by for example: |
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836 - call in script (for main() function in script) |
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837 import cProfile, os |
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838 cProfile.run('main()', os.path.join(os.getcwd(),'main.profile')) |
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839 |
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840 - or on the command line: |
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841 python -m cProfile [-o profile.bin] [-s sort] scriptfile [arg]''' |
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842 import pstats, os |
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843 p = pstats.Stats(os.path.join(os.pardir, profileFilename)) |
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844 if stripDirs: |
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845 p.strip_dirs() |
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846 p.sort_stats('time') |
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847 p.print_stats(.2) |
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848 #p.sort_stats('time') |
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849 # p.print_callees(.1, 'int_prediction.py:') |
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850 return p |
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851 |
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852 ######################### |
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853 # running tests |
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854 ######################### |
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855 |
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856 if __name__ == "__main__": |
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857 import doctest |
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858 import unittest |
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859 suite = doctest.DocFileSuite('tests/utils.txt') |
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860 #suite = doctest.DocTestSuite() |
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861 unittest.TextTestRunner().run(suite) |
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862 #doctest.testmod() |
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863 #doctest.testfile("example.txt") |