RTextTools v1.3.4

[Tim Jurka]

Hi team,

RTextTools v1.3.3 is currently being uploaded to CRAN. This update includes optimizations to the create_matrix() and create_analytics() functions.

Users have reported difficulties using saved models to classify new data. This issue affects several algorithms (e.g. svm, glmnet) because they require that new document-term matrices contain the same terms as the original training matrix. Unfortunately, I did not write these algorithms so I have to adjust each new matrix to contain the same terms as the original training matrix. Therefore, I will be pushing out another update, v1.3.4, that adds an originalMatrix parameter to the create_matrix() function. Passing in the original training matrix will cause RTextTools to adjust the new document-term matrix to only contain the terms from the original matrix. This allows svm and glmnet to use saved models to classify new data without needing to be re-trained.

Note that the maximum entropy algorithm is not affected by this issue.

Best,

Tim

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Timothy P. Jurka
Ph.D. Student

Department of Political Science
University of California, Davis
www.timjurka.com

[Amber Boydstun]

Thanks for handling this Tim.  Let us know if we can do anything to help.

A.

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Amber E. Boydstun
Assistant Professor

Department of Political Science
University of California, Davis

One Shields Ave
Davis, CA 95616

http://psfaculty.ucdavis.edu/boydstun/
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