Project details for gensim

Logo gensim 0.7.5

by Radim - November 3, 2010, 16:58:21 CET [ Project Homepage BibTeX BibTeX for corresponding Paper Download ]

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Gensim - Python Framework for Vector Space Modelling

Gensim is a Python library for Vector Space Modelling with very large corpora. Target audience is the Natural Language Processing (NLP) community.


  • All algorithms are memory-independent w.r.t. the corpus size (can process input larger than RAM),

  • Intuitive interfaces

  • easy to plug in your own input corpus/datastream (trivial streaming API)

  • easy to extend with other Vector Space algorithms (trivial transformation API)

  • Efficient implementations of popular algorithms, such as online Latent Semantic Analysis, Latent Dirichlet Allocation or Random Projections

  • Distributed computing: can run Latent Semantic Analysis and Latent Dirichlet Allocation on a cluster of computers.

  • extensive documentation and tutorials

Reference example

>>> from gensim import corpora, models, similarities
>>> # load corpus iterator from a Matrix Market file on disk
>>> corpus = corpora.MmCorpus('/path/to/')
>>> # initialize a transformation (Latent Semantic Indexing with 200 latent dimensions)
>>> lsi = models.LsiModel(corpus, numTopics=200)
>>> # convert the same corpus to latent space and index it
>>> index = similarities.MatrixSimilarity(lsi[corpus])
>>> # perform similarity query of another vector in LSI space against the whole corpus
>>> sims = index[query]
Changes to previous version:
  • optimizations to the single pass SVD algorithm: 400 factors on the English Wikipedia (3.2M documents, 100K features, 0.5G non-zeros) now take 5.25h on a standard laptop.
  • experiments comparing the one-pass algo with Halko et al.'s fast stochastic multi-pass SVD.
BibTeX Entry: Download
Corresponding Paper BibTeX Entry: Download
Supported Operating Systems: Platform Independent
Data Formats: Agnostic
Tags: Latent Semantic Analysis, Latent Dirichlet Allocation, Svd, Random Projections, Tfidf
Archive: download here


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