CO-CLUSTERING DEVICE, CO-CLUSTERING METHOD, CO-CLUSTERING PROGRAM, AND RECORDING-MEDIUM RECORDING CO-CLUSTERING PROGRAM

摘要

PROBLEM TO BE SOLVED: To co-cluster a user and an item in data such as purchase history data including a missing value on the basis of a more suitable generation process (a probability model).;SOLUTION: A co-clustering device 100 is configured as follows. A prescribed item-selection probability formula is a formula for calculating a temporary selection probability as a multiplication value between a prescribed item-class designation probability and a prescribed user-class designation probability on a probability model for each user-item block or as a value based on the multiplication value. A user-class update part 13 updates a user class on the basis of a prescribed user-class assignment probability formula and the temporary selection probability. An item-class update part 14 updates an item class on the basis of a prescribed item-class assignment probability formula and the temporary selection probability. A co-clustering result evaluation part 15 calculates a posterior probability of matrix information on the basis of the latest matrix information.;COPYRIGHT: (C)2009,JPO&INPIT