Is there a C++ library for LSA/LSI? Preferably MIT, BSD, Apache,... license - no GPL.
Latent Semantic Analysis/Indexing Library for C++
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There are several C/C++ implementations of Latent Diriclet Allocation (LDA), Latent Semantic Analysis (LSA) and Topic Modelling listed on David Blei's page. http://www.cs.columbia.edu/~blei/topicmodeling.html and on Berry and Dumai's page http://web.eecs.utk.edu/research/lsi/
Here's a short-list of C/C++ implementations:
lda-c: D. Blei's implementation with variational inference for LDA.class-slda: C. Wang's implementation of supervised topic models with a categorical response.hdp: C. Wang's implementation of Hierarchical Dirichlet processesGibbs Sampling: Phan and Nguyen's implementation of LDA using Gibbs Sampling -PHP LSA: http://sourceforge.net/projects/phplsa/lsa_prj: https://github.com/matpalm/lsa/tree/master/lsa_prjIf you like a python version with tutorial: see http://www.puffinwarellc.com/index.php/news-and-articles/articles/33-latent-semantic-analysis-tutorial.html?showall=1