Product-Availability-Recommendation-system is a project mainly written in ..., it's free.
In Hadoop, Computes the probability of a product being in stock given its last status, a mapreduce program
This MapReduce program in Hadoop computes the Probabilities of a product being in stock given its last status (in stock / out of stock) It uses the Bayesian posterior as : P(in-stock | last status) = P(in-stock and last-status)/marginal where marginal is P(in-stock and last-status=in)+P(in-stock and last-status=out)