A Modified Method of Latent Class Analysis for File Organization in Information Retrieval
- 1 July 1965
- journal article
- Published by Association for Computing Machinery (ACM) in Journal of the ACM
- Vol. 12 (3) , 356-363
- https://doi.org/10.1145/321281.321286
Abstract
The latent class structure is modified by requiring the number of latent classes to be equal to the number of keywords. This modification changes the latent structure to one that consists of matrices that are both symmetric and positive definite, therefore making a “computer solution” both possible and practical. The modified latent structure is derived, the numerical analysis considerations for a computer solution are presented, and an example illustrates the use of the latent class structure in both file organization and retrieval.Keywords
This publication has 5 references indexed in Scilit:
- Automatic Document ClassificationJournal of the ACM, 1963
- Information Retrieval Based upon Latent Class AnalysisJournal of the ACM, 1962
- Automatic Indexing: An Experimental InquiryJournal of the ACM, 1961
- The Jacobi Method for Real Symmetric MatricesJournal of the ACM, 1959
- On Estimation of Parameters in Latent Structure AnalysisPsychometrika, 1954