Updating the Centroid Decomposition with Applications in LSI

Jason R. Blevins and Moody T. Chu, Unpublished Manuscript, 2004.

Abstract. The centroid decomposition (CD) is an approximate singular value decomposition (SVD) with applications in factor analysis and latent semantic indexing (LSI). This paper presents updating methods for the centroid decomposition based on recent work in SVD updating methods. A general rank–1 updating framework is developed and then more specific updates used in LSI are examined.

Matlab Code: