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1 """
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2 Author: Timothy Tickle
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3 Description: Plots matrices.
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4 """
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5
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6 #####################################################################################
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7 #Copyright (C) <2012>
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8 #
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9 #Permission is hereby granted, free of charge, to any person obtaining a copy of
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10 #this software and associated documentation files (the "Software"), to deal in the
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11 #Software without restriction, including without limitation the rights to use, copy,
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12 #modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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13 #and to permit persons to whom the Software is furnished to do so, subject to
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14 #the following conditions:
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15 #
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16 #The above copyright notice and this permission notice shall be included in all copies
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17 #or substantial portions of the Software.
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18 #
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19 #THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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20 #INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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21 #PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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22 #HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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23 #OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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24 #SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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25 #####################################################################################
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26
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27 __author__ = "Timothy Tickle"
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28 __copyright__ = "Copyright 2012"
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29 __credits__ = ["Timothy Tickle"]
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30 __license__ = "MIT"
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31 __maintainer__ = "Timothy Tickle"
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32 __email__ = "ttickle@sph.harvard.edu"
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33 __status__ = "Development"
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34
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35 #External libraries
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36 import matplotlib.pyplot as plt
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37 import numpy as np
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38 from pylab import *
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39
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40 #Plots a matrix
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41 class PlotMatrix:
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42
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43 #Given a matrix and labels consistent to the matrix, plot a matrix
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44 @staticmethod
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45 def funcPlotMatrix(npMatrix, lsXLabels, strOutputFigurePath, strXTitle="X Axis", strYTitle="Y Axis", fFlipYLabels=False):
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46 """
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47 Given a matrix and labels consistent to the matrix, plot a matrix.
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48
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49 :param npMatrix: Numpy Array (matrix) to plot.
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50 :type: Numpy Array
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51 :param lsXLabels: X Labels
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52 :type: List of strings
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53 :param strOutputFigurePath: File to create the figure file.
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54 :type: String
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55 :param strXTitle: X Axis label.
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56 :type: String
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57 :param strYTitle: Y axis label.
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58 :type: String
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59 :param fFlipYLabels: Flip the Y labels so they are opposite order of x axis.
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60 :type: Boolean
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61 """
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62
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63 #Get canvas/figure
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64 plt.clf()
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65 figConfusionMatrix = plt.figure()
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66 objAxis = figConfusionMatrix.add_subplot(111)
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67
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68 #Get y labels
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69 lNewYLabels = list(lsXLabels)
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70 if fFlipYLabels:
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71 lNewYLabels.reverse()
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72
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73 #Set x axis and position
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74 objAxis.xaxis.set_ticklabels([""]+lsXLabels)
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75 objAxis.xaxis.set_ticks_position('top')
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76
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77 #Set y axis
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78 objAxis.yaxis.set_ticklabels([""]+lNewYLabels)
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79
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80 #Set axis titles
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81 ylabel(strYTitle)
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82 plt.suptitle(strXTitle)
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83
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84 #Plot matrix values
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85 objPlot = objAxis.imshow(np.array(npMatrix), cmap=get_cmap("Blues"), interpolation='nearest')
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86
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87 #Plot text values
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88 for yIndex, ldRow in enumerate(npMatrix):
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89 for xIndex, dValue in enumerate(ldRow):
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90 plt.text(xIndex, yIndex, dValue, fontdict = {'size':18,'weight':'bold'} )
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91
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92 #Add color bar
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93 figConfusionMatrix.colorbar(objPlot, ticks=range(int(min(np.array(npMatrix).ravel())),int(max(np.array(npMatrix).ravel()))))
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94
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95 #Save to a file
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96 savefig(strOutputFigurePath)
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