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NEWS.md

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Changes in v1.4.4

  • Fix texts to pass checks on CRAN.

Changes in v1.4.3

  • Add as.dictionary to create a dictionary object from topic terms.
  • Suppress messages from internal functions.
  • Move quanteda from Depends to Imports.

Changes in v1.4.2

  • Fix tests for quanteda v4.2.0.

Changes in v1.4.1

  • Fix regression in 1.4.0 on Linux-like OS.

Changes in v1.4.0

  • Use configure to link the TBB library on MacOS.
  • Add adjust_alpha as an experimental argument to optimize alpha automatically.
  • Add update_model to update terms of existing models to classify documents with unseen words more accurately.

Changes in v1.3.2

  • Improve the way to convert std::vector to arma::mat.

Changes in v1.3.1

  • Fix C++ code for Armadillo v14.

Changes in v1.3.0

  • Add perplexity() to compute perplexity scores of fitted LDA models.
  • Improve documentation.

Changes in v1.2.1

  • Fix tests on systems when the TBB library is unavailable.

Changes in v1.2.0

  • The RcppParallel package is no longer required as the TBB library in the operating system (Linux and MacOS) or Rtools (Windows) is used.
  • Linux and MacOS must have the TBB library to enable parallel computing before installing this package from the source.

Changes in v1.1.1

  • Allow alpha and beta to be a vector for asymmetric Dirichlet priors.

Changes in v1.1.0

  • Remove uniform to simplify the computation of seed word weights.
  • Add levels argument to better handle hierarchical dictionaries.

Changes in v1.0.1

  • Fix the error when textmodel_seqlda() is called.
  • Save values in the Array object in double to avoid rounding error (#60).

Changes in v1.0.0

  • Add auto_iter to textmodel_seededlda() and textmodel_lda() to stop Gibbs sampling automatically before max_iter is reached.
  • Add batch_size to textmodel_seededlda() and textmodel_lda() to enable the distributed LDA algorithm for parallel computing.

Changes in v0.9.0

  • Add the gamma parameter to textmodel_seededlda() and textmodel_lda() for sequential classification.
  • Add textmodel_seqlda() as as short cut for textmodel_lda(gamma = 0.5).
  • Improve the calculation of weights for seed words.
  • Add the regularize argument to divergence() for the regularized topic divergence measure.

Changes in v0.8.4

  • Fix for deprecation in Matrix 1.5-4.

Changes in v0.8.3

  • Add data_corpus_moviereviews to the package to reduce dependency.

Changes in v0.8.2

  • Add min_prob and select to topics() for greater flexibility
  • Change the divergence measure from Kullback-Leibler to Jensen-Shannon.
  • Add weighted, min_size, select to divergence() for regularized topic divergence scores.

Changes in v0.8.1

  • Change textmodel_seededlda() to set positive integer values to residual.
  • Fix a bug in textmodel_seededlda() that ignores n-grams when concatenator is not "_".
  • Change topics() to return document names.
  • Add divergence() to optimize the number of topics or the seed words (#26).

Changes in v0.8.0

  • Add the model argument to textmodel_lda() to replace predict().

Changes in v0.7.0

  • Change the textmodel_seededlda object to save dictionary and related settings (#18)

Changes in v0.6.0

  • Add predict() to identify topics of unseen documents (#9)
  • Allow selecting seed words based on their frequencies using dfm_trim() in textmodel_seededlda() via ... (#8)

Changes in v0.5.1

  • Change topics() to return factor with NA for empty documents
  • Fix a bug in initializing LDA that leads to incorrect phi (#4 and #6)

Changes in v0.5

  • Implement original LDA estimator using the LDAGibbs++ library