Editing Document-term matrix (section)

===Finding topics===
[[Multivariate analysis]] of the document-term matrix can reveal topics/themes of the corpus. Specifically, [[latent semantic analysis]] and [[data clustering]] can be used, and, more recently, [[probabilistic latent semantic analysis]] with its generalization [[Latent Dirichlet allocation]], and [[non-negative matrix factorization]], have been found to perform well for this task.