PROCESSING METHOD FOR TIME-SERIES ANALYSIS OF KEYWORD, PROCESSING SYSTEM AND COMPUTER PROGRAM THEREOF

摘要

PPROBLEM TO BE SOLVED: To provide a method for efficiently finding the comprehensive trend of keywords. PSOLUTION: A processing method for the time-series analysis of the keyword is provided. The method includes: a step of clustering or classifying document data, which is the description of a phenomenon in natural language, on the basis of the appearance frequencies of the keyword in the document data and also clustering or classifying individual keywords by clustering or classifying the document data; and a step of performing the time-series analysis, for the appearance frequencies of document data including the individual keywords within the cluster or classes obtained by clustering or classifying the document data, or for the appearance frequencies of document data including the cluster or classes obtained by clustering or classifying the individual keywords. Frequency distribution, showing variation in the appearance frequencies of the document data, can be obtained by the time-series analysis. PCOPYRIGHT: (C)2011,JPO&INPIT