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| Class Summary | |
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| TermCountCombiner | |
| TermCountMapper | TextVectorizer Term Count Mapper. |
| TermCountReducer | This accumulates all the words and the weights and sums them up. |
| TermDocumentCountMapper | TextVectorizer Document Frequency Count Mapper. |
| TermDocumentCountReducer | Can also be used as a local Combiner. |
| TFPartialVectorReducer | Converts a document in to a sparse vector |
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