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annotate py/stats.py @ 4:f5a37cc7f41f

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Continue removing the time module. Convert some more struct_time instances to datetime objects.
author John "Elwin" Edwards <elwin@sdf.org>
date Thu, 26 Jul 2012 10:14:56 -0700
parents 5ba2123d2c20
children 25843238434a
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5ba2123d2c20 Put this project under version control, finally.
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1 import math
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2 import psycopg2
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3 import rlgalldb as rlgall
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4
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5 def makeExpPDF(lbd):
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6 def lpdf(x):
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7 return lbd * math.exp(-lbd * x)
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8 return lpdf
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9
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10 def makeExpCDF(lbd):
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11 def lcdf(x):
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12 return 1 - math.exp(-lbd * x)
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13 return lcdf
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14
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15 conn = psycopg2.connect("dbname=rlg")
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16 cur = conn.cursor()
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17 for game in rlgall.gamelist:
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18 query = "SELECT score FROM {0};".format(game.uname)
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19 cur.execute(query)
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20 scores = [ r[0] for r in cur.fetchall() ]
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21 count = len(scores)
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22 total = sum(scores)
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23 lbd = float(count) / total
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24 cdf = makeExpCDF(lbd)
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25 print "{0}: {1} games, average {2}".format(game.name, count, int(1/lbd))
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26 for i in range(0, 10000, 1000):
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27 actual = len([ s for s in scores if i <= s < i + 1000 ])
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28 predicted = (cdf(i + 1000) - cdf(i)) * count
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29 print "{0:5}: {1:4} {2}".format(i, actual, predicted)
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30 high = max(scores)
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31 print "Max: {0} {1}\n".format(high, 1 - cdf(high))
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32
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33 cur.close()
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34 conn.close()
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35 exit()