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-- %TEACHINGWEB%.JacobVogan - 25 Nov 2011

Homework #8b - Bayesian Analysis of Event Grouping

  • event.pl: A perl script that infers what group a set of experiments belongs to using Bayesian inference.

event.pl Features:

  • Accepts files that record one timed event per line, in chronological order, and with the last line indicating when the experiment terminated (EXAMPLE)
  • Input reads two files defining two respective groups, and a third file to be analyzed (e.g. events.group1, events.group2, and events.unknown)
  • Computes the posterior probabilities P( Group = 1 | Unknown ) and P( Group = 2 | Unknown ).
  • Outputs the posterior probability P( Group = 2 | Unknown ) -- which in this homework is P(Active | E3).

event.pl Examples:

  • perl event.pl E1.txt E2.txt E3.txt     Outputs the posterior probability P( E2 | E3 ). Default prior P( E2 ) = 0.01.

  • perl event.pl -h     Prints program information

  • perl event.pl E1.txt E2.txt E3.txt -P 0.5     Option to change prior P( E2 ) to user STDIN (e.g. 0.5).

Terminal Examples:



I AttachmentSorted ascending Action Size Date Who Comment
Txttxt event.pl.txt manage 3.8 K 2011-11-26 - 18:49 JacobVogan perl scripts that infers what group a set of experiments belongs to,
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