"""This file contains code for use with "Think Bayes",
by Allen B. Downey, available from greenteapress.com
Copyright 2012 Allen B. Downey
License: GNU GPLv3 http://www.gnu.org/licenses/gpl.html
"""
from dice import Dice
import thinkplot
class Train(Dice):
"""Represents hypotheses about how many trains the company has.
The likelihood function for the train problem is the same as
for the Dice problem.
"""
def main():
hypos = xrange(1, 1001)
suite = Train(hypos)
suite.Update(60)
print suite.Mean()
thinkplot.PrePlot(1)
thinkplot.Pmf(suite)
thinkplot.Save(root='train1',
xlabel='Number of trains',
ylabel='Probability',
formats=['pdf', 'eps'])
if __name__ == '__main__':
main()
