Mercurial Hosting > traffic-intelligence
annotate python/utils.py @ 665:15e244d2a1b5
corrected bug with circular import for VideoFilenameAddable, moved to base module
author | Nicolas Saunier <nicolas.saunier@polymtl.ca> |
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date | Wed, 20 May 2015 13:57:47 +0200 |
parents | 784298512b60 |
children | 179b81faa1f8 |
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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 from datetime import time, datetime |
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5 from math import sqrt |
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6 |
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7 |
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8 datetimeFormat = "%Y-%m-%d %H:%M:%S" |
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9 |
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10 ######################### |
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11 # Enumerations |
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12 ######################### |
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13 |
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14 def inverseEnumeration(l): |
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15 'Returns the dictionary that provides for each element in the input list its index in the input list' |
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16 result = {} |
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17 for i,x in enumerate(l): |
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18 result[x] = i |
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19 return result |
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20 |
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21 ######################### |
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22 # Simple statistics |
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23 ######################### |
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24 |
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25 def sampleSize(stdev, tolerance, percentConfidence, printLatex = False): |
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26 from scipy.stats.distributions import norm |
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27 k = round(norm.ppf(0.5+percentConfidence/200., 0, 1)*100)/100. # 1.-(100-percentConfidence)/200. |
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28 if printLatex: |
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29 print('${0}^2\\frac{{{1}^2}}{{{2}^2}}$'.format(k, stdev, tolerance)) |
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30 return (k*stdev/tolerance)**2 |
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31 |
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32 def confidenceInterval(mean, stdev, nSamples, percentConfidence, trueStd = True, printLatex = False): |
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33 '''if trueStd, use normal distribution, otherwise, Student |
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34 |
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35 Use otherwise t.interval or norm.interval |
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36 ex: norm.interval(0.95, loc = 0., scale = 2.3/sqrt(11)) |
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37 t.interval(0.95, 10, loc=1.2, scale = 2.3/sqrt(nSamples)) |
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38 loc is mean, scale is sigma/sqrt(n) (for Student, 10 is df)''' |
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39 from math import sqrt |
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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''' |
248
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213 from math import floor |
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214 seconds = int(floor(float(nFrames)/float(frameRate))+initialTime.hour*3600+initialTime.minute*60+initialTime.second) |
261
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215 h = int(floor(seconds/3600.)) |
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216 seconds = seconds - h*3600 |
261
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217 m = int(floor(seconds/60)) |
248
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218 seconds = seconds - m*60 |
262
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219 return time(h, m, seconds) |
248
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220 |
381
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221 def timeToFrames(t, frameRate): |
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222 return frameRate*(t.hour*3600+t.minute*60+t.second) |
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223 |
241
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224 def sortXY(X,Y): |
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225 'returns the sorted (x, Y(x)) sorted on X' |
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226 D = {} |
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227 for x, y in zip(X,Y): |
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228 D[x]=y |
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229 xsorted = sorted(D.keys()) |
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230 return xsorted, [D[x] for x in xsorted] |
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231 |
32 | 232 def ceilDecimals(v, nDecimals): |
233 '''Rounds the number at the nth decimal | |
234 eg 1.23 at 0 decimal is 2, at 1 decimal is 1.3''' | |
235 from math import ceil,pow | |
236 tens = pow(10,nDecimals) | |
237 return ceil(v*tens)/tens | |
238 | |
152
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239 def inBetween(bound1, bound2, x): |
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240 return bound1 <= x <= bound2 or bound2 <= x <= bound1 |
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241 |
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242 def pointDistanceL2(x1,y1,x2,y2): |
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243 ''' Compute point-to-point distance (L2 norm, ie Euclidean distance)''' |
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244 return sqrt((x2-x1)**2+(y2-y1)**2) |
24
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245 |
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246 def crossProduct(l1, l2): |
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247 return l1[0]*l2[1]-l1[1]*l2[0] |
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248 |
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249 def cat_mvgavg(cat_list, halfWidth): |
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250 ''' Return a list of categories/values smoothed according to a window. |
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251 halfWidth is the search radius on either side''' |
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252 from copy import deepcopy |
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253 smoothed = deepcopy(cat_list) |
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254 for point in range(len(cat_list)): |
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255 lower_bound_check = max(0,point-halfWidth) |
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256 upper_bound_check = min(len(cat_list)-1,point+halfWidth+1) |
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257 window_values = cat_list[lower_bound_check:upper_bound_check] |
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258 smoothed[point] = max(set(window_values), key=window_values.count) |
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259 return smoothed |
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260 |
547 | 261 def filterMovingWindow(inputSignal, halfWidth): |
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262 '''Returns an array obtained after the smoothing of the input by a moving average |
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263 The first and last points are copied from the original.''' |
547 | 264 from numpy import ones,convolve,array |
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265 width = float(halfWidth*2+1) |
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266 win = ones(width,'d') |
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267 result = convolve(win/width,array(inputSignal),'same') |
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268 result[:halfWidth] = inputSignal[:halfWidth] |
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269 result[-halfWidth:] = inputSignal[-halfWidth:] |
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270 return result |
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271 |
199
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272 def linearRegression(x, y, deg = 1, plotData = False): |
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273 '''returns the least square estimation of the linear regression of y = ax+b |
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274 as well as the plot''' |
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275 from numpy.lib.polynomial import polyfit |
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276 from matplotlib.pyplot import plot |
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277 from numpy.core.multiarray import arange |
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278 coef = polyfit(x, y, deg) |
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279 if plotData: |
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280 def poly(x): |
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281 result = 0 |
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282 for i in range(len(coef)): |
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283 result += coef[i]*x**(len(coef)-i-1) |
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284 return result |
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285 plot(x, y, 'x') |
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286 xx = arange(min(x), max(x),(max(x)-min(x))/1000) |
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287 plot(xx, [poly(z) for z in xx]) |
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288 return coef |
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289 |
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290 ######################### |
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291 # iterable section |
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292 ######################### |
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293 |
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294 def mostCommon(L): |
456 | 295 '''Returns the most frequent element in a iterable |
296 | |
297 taken from http://stackoverflow.com/questions/1518522/python-most-common-element-in-a-list''' | |
455
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298 from itertools import groupby |
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299 from operator import itemgetter |
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300 # get an iterable of (item, iterable) pairs |
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301 SL = sorted((x, i) for i, x in enumerate(L)) |
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302 # print 'SL:', SL |
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303 groups = groupby(SL, key=itemgetter(0)) |
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304 # auxiliary function to get "quality" for an item |
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305 def _auxfun(g): |
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306 item, iterable = g |
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307 count = 0 |
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308 min_index = len(L) |
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309 for _, where in iterable: |
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310 count += 1 |
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311 min_index = min(min_index, where) |
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312 # print 'item %r, count %r, minind %r' % (item, count, min_index) |
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313 return count, -min_index |
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314 # pick the highest-count/earliest item |
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315 return max(groups, key=_auxfun)[0] |
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316 |
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317 ######################### |
370
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318 # sequence section |
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319 ######################### |
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320 |
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321 class LCSS(object): |
370
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322 '''Class that keeps the LCSS parameters |
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323 and puts together the various computations''' |
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324 def __init__(self, similarityFunc, delta = float('inf'), aligned = False, lengthFunc = min): |
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325 self.similarityFunc = similarityFunc |
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326 self.aligned = aligned |
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327 self.delta = delta |
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328 self.lengthFunc = lengthFunc |
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329 self.subSequenceIndices = [(0,0)] |
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330 |
373
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331 def similarities(self, l1, l2, jshift=0): |
370
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332 from numpy import zeros, int as npint |
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333 n1 = len(l1) |
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334 n2 = len(l2) |
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335 self.similarityTable = zeros((n1+1,n2+1), dtype = npint) |
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336 for i in xrange(1,n1+1): |
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337 for j in xrange(max(1,i-jshift-self.delta),min(n2,i-jshift+self.delta)+1): |
370
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338 if self.similarityFunc(l1[i-1], l2[j-1]): |
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339 self.similarityTable[i,j] = self.similarityTable[i-1,j-1]+1 |
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340 else: |
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341 self.similarityTable[i,j] = max(self.similarityTable[i-1,j], self.similarityTable[i,j-1]) |
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342 |
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343 def subSequence(self, i, j): |
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344 '''Returns the subsequence of two sequences |
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345 http://en.wikipedia.org/wiki/Longest_common_subsequence_problem''' |
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346 if i == 0 or j == 0: |
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347 return [] |
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348 elif self.similarityTable[i][j] == self.similarityTable[i][j-1]: |
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349 return self.subSequence(i, j-1) |
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350 elif self.similarityTable[i][j] == self.similarityTable[i-1][j]: |
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351 return self.subSequence(i-1, j) |
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352 else: |
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353 return self.subSequence(i-1, j-1) + [(i-1,j-1)] |
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354 |
373
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355 def _compute(self, _l1, _l2, computeSubSequence = False): |
370
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356 '''returns the longest common subsequence similarity |
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357 based on the threshold on distance between two elements of lists l1, l2 |
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358 similarityFunc returns True or False whether the two points are considered similar |
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359 |
607 | 360 if aligned, returns the best matching if using a finite delta by shifting the series alignments |
373
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361 |
370
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362 eg distance(p1, p2) < epsilon |
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363 ''' |
372
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364 if len(_l2) < len(_l1): # l1 is the shortest |
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365 l1 = _l2 |
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366 l2 = _l1 |
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367 revertIndices = True |
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368 else: |
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369 l1 = _l1 |
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370 l2 = _l2 |
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371 revertIndices = False |
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372 n1 = len(l1) |
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373 n2 = len(l2) |
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374 |
370
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375 if self.aligned: |
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376 lcssValues = {} |
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377 similarityTables = {} |
374
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378 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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379 self.similarities(l1, l2, i) |
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380 lcssValues[i] = self.similarityTable.max() |
370
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381 similarityTables[i] = self.similarityTable |
374
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382 #print self.similarityTable |
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383 alignmentShift = argmaxDict(lcssValues) # ideally get the medium alignment shift, the one that minimizes distance |
389
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384 self.similarityTable = similarityTables[alignmentShift] |
372
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385 else: |
389
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386 alignmentShift = 0 |
372
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387 self.similarities(l1, l2) |
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388 |
374
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389 # threshold values for the useful part of the similarity table are n2-n1-delta and n1-n2-delta |
389
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390 self.similarityTable = self.similarityTable[:min(n1, n2+alignmentShift+self.delta)+1, :min(n2, n1-alignmentShift+self.delta)+1] |
373
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391 |
372
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392 if computeSubSequence: |
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393 self.subSequenceIndices = self.subSequence(self.similarityTable.shape[0]-1, self.similarityTable.shape[1]-1) |
371
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394 if revertIndices: |
374
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395 self.subSequenceIndices = [(j,i) for i,j in self.subSequenceIndices] |
372
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396 return self.similarityTable[-1,-1] |
370
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397 |
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398 def compute(self, l1, l2, computeSubSequence = False): |
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399 '''get methods are to be shadowed in child classes ''' |
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400 return self._compute(l1, l2, computeSubSequence) |
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401 |
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402 def computeAlignment(self): |
370
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403 from numpy import mean |
374
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404 return mean([j-i for i,j in self.subSequenceIndices]) |
370
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405 |
376
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406 def _computeNormalized(self, l1, l2, computeSubSequence = False): |
370
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407 ''' compute the normalized LCSS |
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408 ie, the LCSS divided by the min or mean of the indicator lengths (using lengthFunc) |
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409 lengthFunc = lambda x,y:float(x,y)/2''' |
376
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410 return float(self._compute(l1, l2, computeSubSequence))/self.lengthFunc(len(l1), len(l2)) |
370
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411 |
376
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412 def computeNormalized(self, l1, l2, computeSubSequence = False): |
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413 return self._computeNormalized(l1, l2, computeSubSequence) |
370
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414 |
376
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415 def _computeDistance(self, l1, l2, computeSubSequence = False): |
370
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416 ''' compute the LCSS distance''' |
376
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417 return 1-self._computeNormalized(l1, l2, computeSubSequence) |
370
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418 |
376
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419 def computeDistance(self, l1, l2, computeSubSequence = False): |
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420 return self._computeDistance(l1, l2, computeSubSequence) |
370
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421 |
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422 ######################### |
45
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423 # plotting section |
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424 ######################### |
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425 |
332
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426 def plotPolygon(poly, options = ''): |
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427 'Plots shapely polygon poly' |
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428 from numpy.core.multiarray import array |
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429 from matplotlib.pyplot import plot |
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430 from shapely.geometry import Polygon |
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431 |
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432 tmp = array(poly.exterior) |
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433 plot(tmp[:,0], tmp[:,1], options) |
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434 |
324 | 435 def stepPlot(X, firstX, lastX, initialCount = 0, increment = 1): |
436 '''for each value in X, increment by increment the initial count | |
297
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437 returns the lists that can be plotted |
324 | 438 to obtain a step plot increasing by one for each value in x, from first to last value |
439 firstX and lastX should be respectively smaller and larger than all elements in X''' | |
297
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440 |
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441 sortedX = [] |
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442 counts = [initialCount] |
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443 for x in sorted(X): |
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444 sortedX += [x,x] |
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445 counts.append(counts[-1]) |
324 | 446 counts.append(counts[-1]+increment) |
297
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447 counts.append(counts[-1]) |
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448 return [firstX]+sortedX+[lastX], counts |
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449 |
665
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450 class PlottingPropertyValues(object): |
45
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451 def __init__(self, values): |
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452 self.values = values |
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453 |
116
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454 def __getitem__(self, i): |
45
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455 return self.values[i%len(self.values)] |
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456 |
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457 markers = PlottingPropertyValues(['+', '*', ',', '.', 'x', 'D', 's', 'o']) |
116
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458 scatterMarkers = PlottingPropertyValues(['s','o','^','>','v','<','d','p','h','8','+','x']) |
45
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459 |
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460 linestyles = PlottingPropertyValues(['-', '--', '-.', ':']) |
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461 |
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462 colors = PlottingPropertyValues('brgmyck') # 'w' |
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463 |
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464 def plotIndicatorMap(indicatorMap, squareSize, masked = True, defaultValue=-1): |
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465 from numpy import array, arange, ones, ma |
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466 from matplotlib.pyplot import pcolor |
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467 coords = array(indicatorMap.keys()) |
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468 minX = min(coords[:,0]) |
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469 minY = min(coords[:,1]) |
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470 X = arange(minX, max(coords[:,0])+1.1)*squareSize |
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471 Y = arange(minY, max(coords[:,1])+1.1)*squareSize |
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472 C = defaultValue*ones((len(Y), len(X))) |
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473 for k,v in indicatorMap.iteritems(): |
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474 C[k[1]-minY,k[0]-minX] = v |
115
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475 if masked: |
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476 pcolor(X, Y, ma.masked_where(C==defaultValue,C)) |
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477 else: |
550556378466
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478 pcolor(X, Y, C) |
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moved and generalized map making functions to the library
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479 |
45
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added colors, linestyles and markers to pick from
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480 ######################### |
637
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481 # Data download |
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482 ######################### |
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483 |
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484 def downloadECWeather(stationID, years, months = [], outputDirectoryname = '.', english = True): |
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485 '''Downloads monthly weather data from Environment Canada |
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486 If month is provided (number 1 to 12), it means hourly data for the whole month |
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487 Otherwise, means the data for each day, for the whole year |
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488 |
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489 Example: MONTREAL MCTAVISH 10761 |
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490 MONTREALPIERRE ELLIOTT TRUDEAU INTL A 5415 |
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491 |
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492 To get daily data for 2010 and 2011, downloadECWeather(10761, [2010,2011], [], '/tmp') |
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493 To get hourly data for 2009 and 2012, January, March and October, downloadECWeather(10761, [2009,2012], [1,3,10], '/tmp')''' |
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494 import urllib2 |
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495 if english: |
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496 language = 'e' |
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497 else: |
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498 language = 'f' |
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499 if len(months) == 0: |
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500 timeFrame = 2 |
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501 months = [1] |
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502 else: |
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503 timeFrame = 1 |
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504 |
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505 for year in years: |
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506 for month in months: |
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507 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)) |
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508 data = url.read() |
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509 outFilename = '{}/{}-{}'.format(outputDirectoryname, stationID, year) |
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510 if timeFrame == 1: |
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511 outFilename += '-{}-hourly'.format(month) |
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512 else: |
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513 outFilename += '-daily' |
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514 outFilename += '.csv' |
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515 out = open(outFilename, 'w') |
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516 out.write(data) |
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517 out.close() |
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518 |
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519 ######################### |
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520 # File I/O |
27
44689029a86f
updated segmentIntersection and other
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521 ######################### |
24
6fb59cfb201e
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|
522 |
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523 def removeExtension(filename, delimiter = '.'): |
31
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524 '''Returns the filename minus the extension (all characters after last .)''' |
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525 i = filename.rfind(delimiter) |
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526 if i>0: |
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527 return filename[:i] |
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528 else: |
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529 return filename |
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|
530 |
46
b5d007612e16
added filename util
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diff
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|
531 def cleanFilename(s): |
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diff
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|
532 'cleans filenames obtained when contatenating figure characteristics' |
266
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533 return s.replace(' ','-').replace('.','').replace('/','-') |
46
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diff
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|
534 |
0
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535 def listfiles(dirname, extension, remove = False): |
14
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7
diff
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|
536 '''Returns the list of files with the extension in the directory dirname |
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537 If remove is True, the filenames are stripped from the extension''' |
0
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538 from os import listdir |
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|
539 tmp = [f for f in listdir(dirname) if f.endswith(extension)] |
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|
540 tmp.sort() |
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|
541 if remove: |
aed8eb63cdde
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|
542 return [removeExtension(f, extension) for f in tmp] |
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diff
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|
543 else: |
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|
544 return tmp |
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|
545 |
266
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|
546 def mkdir(dirname): |
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diff
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|
547 'Creates a directory if it does not exist' |
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diff
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|
548 import os |
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549 if not os.path.exists(dirname): |
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diff
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|
550 os.mkdir(dirname) |
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diff
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|
551 else: |
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|
552 print(dirname+' already exists') |
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|
553 |
14
e7bbe8465591
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diff
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|
554 def removeFile(filename): |
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homography and other utils
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diff
changeset
|
555 '''Deletes the file while avoiding raising an error |
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|
556 if the file does not exist''' |
266
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|
557 import os |
14
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|
558 if (os.path.exists(filename)): |
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diff
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|
559 os.remove(filename) |
266
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|
560 else: |
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diff
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|
561 print(filename+' does not exist') |
14
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diff
changeset
|
562 |
42
1a2ac2d4f53a
added loading of the rest of the data for objects
Nicolas Saunier <nicolas.saunier@polymtl.ca>
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35
diff
changeset
|
563 def line2Floats(l, separator=' '): |
1a2ac2d4f53a
added loading of the rest of the data for objects
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parents:
35
diff
changeset
|
564 '''Returns the list of floats corresponding to the string''' |
1a2ac2d4f53a
added loading of the rest of the data for objects
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parents:
35
diff
changeset
|
565 return [float(x) for x in l.split(separator)] |
1a2ac2d4f53a
added loading of the rest of the data for objects
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parents:
35
diff
changeset
|
566 |
1a2ac2d4f53a
added loading of the rest of the data for objects
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents:
35
diff
changeset
|
567 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
|
568 '''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
|
569 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
|
570 |
c000f37c316d
moved tests to independent file, added chi2 computation
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parents:
29
diff
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|
571 ######################### |
332
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diff
changeset
|
572 # CLI utils |
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diff
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|
573 ######################### |
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diff
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|
574 |
a6ca86107f27
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diff
changeset
|
575 def parseCLIOptions(helpMessage, options, cliArgs, optionalOptions=[]): |
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diff
changeset
|
576 ''' Simple function to handle similar argument parsing |
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diff
changeset
|
577 Returns the dictionary of options and their values |
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diff
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|
578 |
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diff
changeset
|
579 * cliArgs are most likely directly sys.argv |
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diff
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|
580 (only the elements after the first one are considered) |
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diff
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|
581 |
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diff
changeset
|
582 * options should be a list of strings for getopt options, |
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diff
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|
583 eg ['frame=','correspondences=','video='] |
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diff
changeset
|
584 A value must be provided for each option, or the program quits''' |
a6ca86107f27
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324
diff
changeset
|
585 import sys, getopt |
a6ca86107f27
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parents:
324
diff
changeset
|
586 from numpy.core.fromnumeric import all |
a6ca86107f27
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diff
changeset
|
587 optionValues, args = getopt.getopt(cliArgs[1:], 'h', ['help']+options+optionalOptions) |
a6ca86107f27
reorganized utils module
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diff
changeset
|
588 optionValues = dict(optionValues) |
a6ca86107f27
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diff
changeset
|
589 |
a6ca86107f27
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diff
changeset
|
590 if '--help' in optionValues.keys() or '-h' in optionValues.keys(): |
a6ca86107f27
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324
diff
changeset
|
591 print(helpMessage+ |
a6ca86107f27
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324
diff
changeset
|
592 '\n - Compulsory options: '+' '.join([opt.replace('=','') for opt in options])+ |
a6ca86107f27
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diff
changeset
|
593 '\n - Non-compulsory options: '+' '.join([opt.replace('=','') for opt in optionalOptions])) |
a6ca86107f27
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diff
changeset
|
594 sys.exit() |
a6ca86107f27
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parents:
324
diff
changeset
|
595 |
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596 missingArgument = [('--'+opt.replace('=','') in optionValues.keys()) for opt in options] |
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597 if not all(missingArgument): |
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598 print('Missing argument') |
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599 print(optionValues) |
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600 sys.exit() |
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601 |
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602 return optionValues |
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603 |
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604 |
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605 ######################### |
553
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606 # Profiling |
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607 ######################### |
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608 |
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609 def analyzeProfile(profileFilename, stripDirs = True): |
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610 '''Analyze the file produced by cProfile |
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611 |
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612 obtained by for example: |
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613 - call in script (for main() function in script) |
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614 import cProfile, os |
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615 cProfile.run('main()', os.path.join(os.getcwd(),'main.profile')) |
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616 |
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617 - or on the command line: |
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618 python -m cProfile [-o profile.bin] [-s sort] scriptfile [arg]''' |
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619 import pstats, os |
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620 p = pstats.Stats(os.path.join(os.pardir, profileFilename)) |
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621 if stripDirs: |
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622 p.strip_dirs() |
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623 p.sort_stats('time') |
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624 p.print_stats(.2) |
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625 #p.sort_stats('time') |
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626 # p.print_callees(.1, 'int_prediction.py:') |
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627 return p |
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628 |
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629 ######################### |
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630 # running tests |
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631 ######################### |
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632 |
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633 if __name__ == "__main__": |
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634 import doctest |
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635 import unittest |
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636 suite = doctest.DocFileSuite('tests/utils.txt') |
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637 #suite = doctest.DocTestSuite() |
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638 unittest.TextTestRunner().run(suite) |
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639 #doctest.testmod() |
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640 #doctest.testfile("example.txt") |