Patent ID: 8417648

Claim:
A change analysis system, comprising: a virtual labeling module configured to prepare by the performance of a computer processor a labeled data set by assigning a first virtual label to each data sample in a first data set, and for assigning a second virtual label to each data sample in a second data set, the second virtual label being different from the first virtual label; a classifier configured to classify the data samples in the labeled data set by use of the virtual labels; and an accuracy determination module configured to determine the accuracy of the classification of the data samples in the labeled data set based on the number of blocks of data in the labeled data set that are divided; a change analysis module configured to send the classifier the labeled data set and output a contribution rate at which each of a plurality of attributes contribute to classification of the first data set and the second data set, wherein the change analysis module detects change in the first data set by comparing the first data set with the second data set.