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