Latent semantic analysis (LSA) is an algorithm applied to approximate the meaning of texts, thereby exposing semantic structure to computation. LSA combines the classical vector-space model - well known in computational linguistics - with a singular value decomposition (SVD), a two-mode factor analysis. Thus, bag-of-words representations of texts can be mapped into a modified vector space that is assumed to reflect semantic structure. In this contribution the authors describe the lsa package for the statistical language and environment R and illustrate its proper use through examples from the areas of automated essay scoring and knowledge representation.
CITATION STYLE
Wild, F., & Stahl, C. (2007). Investigating unstructured texts with latent semantic analysis. In Studies in Classification, Data Analysis, and Knowledge Organization (pp. 383–390). Kluwer Academic Publishers. https://doi.org/10.1007/978-3-540-70981-7_43
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