Tf parameter learning#2

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alexandre-jalgos wants to merge 8 commits intojalgos:masterfrom

alexandre-jalgos:tf_parameter_learning

Commits on Jun 12, 2019

Implemented a `weightModel` function that returns document term matrix learned parameters, namely the document frequency and the dictionary. But it will be more flexible to implement this logic in …
Alexandre Tadros
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Commits on Jun 17, 2019

weightModel and weighSMART2 improvements with ndoc parameter
Alexandre Tadros
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Commits on Jul 15, 2019

Fixed model impllementation and adaptive learning of document term matrix and text embedding
Alexandre Tadros
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Removed unused function
Alexandre Tadros
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Removed unused weight function
Alexandre Tadros
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Commits on Jul 22, 2019

Fixed minor bugs to compute empty description documents in TF data table
Alexandre Tadros
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Commits on Jul 31, 2019

Fixed bug related to term not in dictionary in TF data.table
Alexandre Tadros
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Commits on Aug 7, 2019

factor columns in TF data.table
Alexandre Tadros
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