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comparison tools/mytools/stats.txt @ 0:9071e359b9a3

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author xuebing
date Fri, 09 Mar 2012 19:37:19 -0500
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-1:000000000000 0:9071e359b9a3
1 #! /usr/bin/python
2 # stats.py
3 # P. Clote
4
5 import sys,os,tempfile,string,math
6
7
8 def getStats(L):
9 #L is list
10 if L==[]:
11 return (0,0,0,0)
12 max = -sys.maxint
13 min = sys.maxint
14
15 count = 0
16 sum = 0.0
17 sumSquares = 0.0
18 for value in L:
19 x = float(value)
20 if x<min: min=x
21 if x>max: max=x
22 count = count+1
23 sum = sum+x
24 sumSquares = sumSquares+x**2
25 mean = sum/count
26 variance = sumSquares/count - mean**2
27 stdev = math.sqrt(variance)
28 #print "Mean:%f\tStDev:%f\tMax:%f\tMin:%f" % (mean,stdev,max,min)
29 return (mean,stdev,max,min)
30
31
32 if __name__ == '__main__':
33 L = sys.argv[1:]
34 (mean,stdev,max,min) = getStats(L)
35 print "Mean:%f\tStDev:%f\tMax:%f\tMin:%f" % (mean,stdev,max,min)
36