Implement Bayesian inference using PHP: Part 2, IBM developerWorks, April 13, 2004.

In this second article on Bayesian inference, Paul Meagher examines how you can use Bayes methods to solve parameter estimation problems. Relevant concepts are explained in the context of Web survey analysis using PHP and JPGraph.

• Bayes2.tar.gz

Last updated: April 14, 2004 - 2:30 AM AST

Demos:

• likelihood_graph1.php - graph of likelihood distribution for binomial parameter p.
• likelihood_graph2.php - same as graph 1 without the _nC_k term.
• likelihood_graph3.php - graph of log likelihood distribution for binomial parameter p.
• test_beta.php - test of ProbabilityDistribution, BetaDistibution.php, and SpecialMath.php classes.
• beta_graph1.php - graph of beta distibution for a=1 and b=4.
• beta_graph2.php - graph of beta distibution for a=4 and b=16.
• beta_graph3.php - graph of beta distibution for a=5 and b=20.

Source code listing:

• README.txt
• binomial.php
• likelihood_graph1.php
• likelihood_graph2.php
• likelihood_graph3.php
• ProbabilityDistribution.php
• BetaDistribution.php
• SpecialMath.php
• test_beta.php
• beta_graph1.php
• beta_graph2.php
• beta_graph3.php
• config.php