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comparison python/indicators.py @ 308:8bafd054cda4

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Added a function to compute LCSS distance between two indcators
author Mohamed Gomaa
date Tue, 25 Dec 2012 02:20:25 -0500
parents abbd4bc13dac
children 6c068047edbf
comparison
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307:8e66ced156dd 308:8bafd054cda4
2 '''Class for indicators, temporal indicators, and safety indicators''' 2 '''Class for indicators, temporal indicators, and safety indicators'''
3 3
4 __metaclass__ = type 4 __metaclass__ = type
5 5
6 import moving 6 import moving
7 7 from utils import LCSS
8 # need for a class representing the indicators, their units, how to print them in graphs... 8 # need for a class representing the indicators, their units, how to print them in graphs...
9 class TemporalIndicator: 9 class TemporalIndicator:
10 '''Class for temporal indicators 10 '''Class for temporal indicators
11 i.e. indicators that take a value at specific instants 11 i.e. indicators that take a value at specific instants
12 12
80 marker = '' 80 marker = ''
81 time = sorted(self.values.keys()) 81 time = sorted(self.values.keys())
82 plot([x/xfactor for x in time], [self.values[i] for i in time], options+marker, **kwargs) 82 plot([x/xfactor for x in time], [self.values[i] for i in time], options+marker, **kwargs)
83 if self.maxValue: 83 if self.maxValue:
84 ylim(ymax = self.maxValue) 84 ylim(ymax = self.maxValue)
85 85
86 def valueSorted(self):
87 ''' return the values after sort the keys in the indicator'''
88 values=[]
89 keys = self.values.keys()
90 keys.sort()
91 for key in keys:
92 values.append(self.values[key])
93 return values
94 @staticmethod
95 def getDLCSS(TemporalIndicator1,TemporalIndicator2, threshold, delta= np.inf , method='min' ):
96 ''' compute the distance between two indicators using LCSS
97 two common methods are used: min or mean of the indicators length'''
98 l1= TemporalIndicator1.valueSorted
99 l2= TemporalIndicator2.valueSorted
100 if method = 'min':
101 DLCSS= 1- (LCSS(l1,l2, threshold, delta, distance))/min(len(l1),len(l2)))
102 if method = 'mean':
103 average= len(l1)+len(l2))/2
104 DLCSS= 1- ((LCSS(l1,l2, threshold, delta, distance))/average)
105 return DLCSS
106
86 class SeverityIndicator(TemporalIndicator): 107 class SeverityIndicator(TemporalIndicator):
87 '''Class for severity indicators 108 '''Class for severity indicators
88 field mostSevereIsMax is True 109 field mostSevereIsMax is True
89 if the most severe value taken by the indicator is the maximum''' 110 if the most severe value taken by the indicator is the maximum'''
90 111