Mercurial Hosting > traffic-intelligence
annotate python/indicators.py @ 398:3399bd48cb40
Ajout d'une méthode pour obtenir le nombre de FPS
Méthode de capture des trames vidéos plus résistante aux erreur
Utilisation d'un dictionnaire pour les fichier de configuration afin de garder le nom des sections
author | Jean-Philippe Jodoin <jpjodoin@gmail.com> |
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date | Mon, 29 Jul 2013 13:46:07 -0400 |
parents | 6d26dcc7bba0 |
children | 365d8dee44f3 |
rev | line source |
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1 #! /usr/bin/env python |
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2 '''Class for indicators, temporal indicators, and safety indicators''' |
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3 |
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4 __metaclass__ = type |
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5 |
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6 import moving |
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7 |
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8 # need for a class representing the indicators, their units, how to print them in graphs... |
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9 class TemporalIndicator: |
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10 '''Class for temporal indicators |
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11 i.e. indicators that take a value at specific instants |
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12 |
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13 values should be |
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14 * a dict, for the values at specific time instants |
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15 * or a list with a time interval object if continuous measurements |
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16 |
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17 it should have more information like name, unit''' |
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18 |
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19 def __init__(self, name, values, timeInterval=None, maxValue = None): |
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20 self.name = name |
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21 if timeInterval: |
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22 assert len(values) == timeInterval.length() |
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23 self.timeInterval = timeInterval |
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24 self.values = {} |
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25 for i in xrange(int(round(self.timeInterval.length()))): |
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26 self.values[self.timeInterval[i]] = values[i] |
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27 else: |
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28 self.values = values |
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29 instants = sorted(self.values.keys()) |
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30 if instants: |
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31 self.timeInterval = moving.TimeInterval(instants[0], instants[-1]) |
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32 else: |
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33 self.timeInterval = moving.TimeInterval() |
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34 self.maxValue = maxValue |
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35 |
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36 def __len__(self): |
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37 return len(self.values) |
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38 |
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39 def empty(self): |
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40 return len(self.values) == 0 |
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41 |
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42 def __getitem__(self, i): |
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43 'Returns ith value in time interval' |
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44 if i in self.values.keys(): |
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45 return self.values[i] |
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46 else: |
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47 return None |
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48 |
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49 def getIthValue(self, i): |
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50 sortedKeys = sorted(self.values.keys()) |
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51 if 0<=i<len(sortedKeys): |
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52 return self.values[sortedKeys[i]] |
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53 else: |
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54 return None |
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55 |
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56 def __iter__(self): |
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57 self.iterInstantNum = 0 # index in the interval or keys of the dict |
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58 return self |
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59 |
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60 def next(self): |
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61 if self.iterInstantNum >= len(self.values):#(self.timeInterval and self.iterInstantNum>=self.timeInterval.length())\ |
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62 # or (self.iterInstantNum >= self.values) |
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63 raise StopIteration |
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64 else: |
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65 self.iterInstantNum += 1 |
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66 return self.getIthValue(self.iterInstantNum-1) |
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67 |
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68 def getTimeInterval(self): |
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69 return self.timeInterval |
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70 |
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71 def getName(self): |
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72 return self.name |
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73 |
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74 def getValues(self): |
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75 return [self.__getitem__(t) for t in self.timeInterval] |
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76 |
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77 def plot(self, options = '', xfactor = 1., timeShift = 0, **kwargs): |
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78 from matplotlib.pylab import plot,ylim |
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79 if self.getTimeInterval().length() == 1: |
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80 marker = 'o' |
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81 else: |
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82 marker = '' |
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83 time = sorted(self.values.keys()) |
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84 plot([(x+timeShift)/xfactor for x in time], [self.values[i] for i in time], options+marker, **kwargs) |
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85 if self.maxValue: |
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86 ylim(ymax = self.maxValue) |
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87 |
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88 def valueSorted(self): |
312 | 89 ''' return the values after sort the keys in the indicator |
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90 This should probably not be used: to delete''' |
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91 print('Deprecated: values should not be accessed in this way') |
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92 values=[] |
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93 keys = self.values.keys() |
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94 keys.sort() |
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95 for key in keys: |
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96 values.append(self.values[key]) |
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97 return values |
312 | 98 |
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99 |
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100 def distanceForLCSS(x, y): # lambda x,y:abs(x-y) |
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101 if x == None or y == None: |
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102 return float('inf') |
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103 else: |
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104 return abs(x-y) |
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105 |
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106 from utils import LCSS as utilsLCSS |
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107 |
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108 class LCSS(utilsLCSS): |
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109 '''Adapted LCSS class for indicators, same pattern''' |
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110 def __init__(self, threshold, delta = float('inf'), minLength = 0, aligned = False, lengthFunc = min): |
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111 utilsLCSS.__init__(self, lambda x,y: (distanceForLCSS(x,y) <= threshold), delta, aligned, lengthFunc) |
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112 self.minLength = minLength |
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113 |
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114 def checkIndicator(self, indicator): |
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115 return indicator != None and len(indicator) >= self.minLength |
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116 |
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117 def compute(self, indicator1, indicator2, computeSubSequence = False): |
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118 if self.checkIndicator(indicator1) and self.checkIndicator(indicator2): |
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119 return self._compute(indicator1.getValues(), indicator2.getValues(), computeSubSequence) |
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120 else: |
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121 return 0 |
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122 |
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123 def computeNormalized(self, indicator1, indicator2, computeSubSequence = False): |
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124 if self.checkIndicator(indicator1) and self.checkIndicator(indicator2): |
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125 return self._computeNormalized(indicator1.getValues(), indicator2.getValues(), computeSubSequence) |
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126 else: |
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127 return 0. |
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128 |
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129 def computeDistance(self, indicator1, indicator2, computeSubSequence = False): |
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130 if self.checkIndicator(indicator1) and self.checkIndicator(indicator2): |
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131 return self._computeDistance(indicator1.getValues(), indicator2.getValues(), computeSubSequence) |
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132 else: |
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133 return 1. |
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134 |
244
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135 class SeverityIndicator(TemporalIndicator): |
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136 '''Class for severity indicators |
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137 field mostSevereIsMax is True |
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138 if the most severe value taken by the indicator is the maximum''' |
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139 |
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140 def __init__(self, name, values, timeInterval=None, mostSevereIsMax=True, maxValue = None): |
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141 TemporalIndicator.__init__(self, name, values, timeInterval, maxValue) |
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142 self.mostSevereIsMax = mostSevereIsMax |
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143 |
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144 def getMostSevereValue(self, minNInstants=1): # TODO use scoreatpercentile |
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145 from matplotlib.mlab import find |
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146 from numpy.core.multiarray import array |
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147 from numpy.core.fromnumeric import mean |
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148 values = array(self.values.values()) |
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149 indices = range(len(values)) |
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150 if len(indices) >= minNInstants: |
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151 values = sorted(values[indices], reverse = self.mostSevereIsMax) # inverted if most severe is max -> take the first values |
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152 return mean(values[:minNInstants]) |
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153 else: |
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154 return None |
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155 |
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156 # functions to aggregate discretized maps of indicators |
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157 # TODO add values in the cells between the positions (similar to discretizing vector graphics to bitmap) |
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158 |
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159 def indicatorMap(indicatorValues, trajectory, squareSize): |
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160 '''Returns a dictionary |
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161 with keys for the indices of the cells (squares) |
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162 in which the trajectory positions are located |
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163 at which the indicator values are attached |
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164 |
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165 ex: speeds and trajectory''' |
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166 |
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167 from numpy import floor, mean |
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168 assert len(indicatorValues) == trajectory.length() |
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169 indicatorMap = {} |
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170 for k in xrange(trajectory.length()): |
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171 p = trajectory[k] |
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172 i = floor(p.x/squareSize) |
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173 j = floor(p.y/squareSize) |
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174 if indicatorMap.has_key((i,j)): |
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175 indicatorMap[(i,j)].append(indicatorValues[k]) |
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176 else: |
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177 indicatorMap[(i,j)] = [indicatorValues[k]] |
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178 for k in indicatorMap.keys(): |
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179 indicatorMap[k] = mean(indicatorMap[k]) |
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180 return indicatorMap |
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181 |
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182 def indicatorMapFromPolygon(value, polygon, squareSize): |
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183 '''Fills an indicator map with the value within the polygon |
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184 (array of Nx2 coordinates of the polygon vertices)''' |
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185 import matplotlib.nxutils as nx |
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186 from numpy.core.multiarray import array, arange |
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187 from numpy import floor |
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188 |
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189 points = [] |
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190 for x in arange(min(polygon[:,0])+squareSize/2, max(polygon[:,0]), squareSize): |
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191 for y in arange(min(polygon[:,1])+squareSize/2, max(polygon[:,1]), squareSize): |
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192 points.append([x,y]) |
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193 inside = nx.points_inside_poly(array(points), polygon) |
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194 indicatorMap = {} |
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195 for i in xrange(len(inside)): |
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196 if inside[i]: |
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197 indicatorMap[(floor(points[i][0]/squareSize), floor(points[i][1]/squareSize))] = 0 |
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198 return indicatorMap |
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199 |
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200 def indicatorMapFromAxis(value, limits, squareSize): |
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201 '''axis = [xmin, xmax, ymin, ymax] ''' |
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202 from numpy.core.multiarray import arange |
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203 from numpy import floor |
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204 indicatorMap = {} |
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205 for x in arange(limits[0], limits[1], squareSize): |
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206 for y in arange(limits[2], limits[3], squareSize): |
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207 indicatorMap[(floor(x/squareSize), floor(y/squareSize))] = value |
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208 return indicatorMap |
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209 |
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210 def combineIndicatorMaps(maps, squareSize, combinationFunction): |
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211 '''Puts many indicator maps together |
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212 (averaging the values in each cell |
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213 if more than one maps has a value)''' |
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214 #from numpy import mean |
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215 indicatorMap = {} |
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216 for m in maps: |
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217 for k,v in m.iteritems(): |
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218 if indicatorMap.has_key(k): |
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219 indicatorMap[k].append(v) |
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220 else: |
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221 indicatorMap[k] = [v] |
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222 for k in indicatorMap.keys(): |
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223 indicatorMap[k] = combinationFunction(indicatorMap[k]) |
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224 return indicatorMap |
247
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225 |
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226 if __name__ == "__main__": |
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227 import doctest |
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228 import unittest |
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229 suite = doctest.DocFileSuite('tests/indicators.txt') |
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230 unittest.TextTestRunner().run(suite) |
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231 # #doctest.testmod() |
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232 # #doctest.testfile("example.txt") |