Seth Hendrickson created SPARK-17471:
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Summary: Add compressed method for Matrix class
Key: SPARK-17471
URL: https://issues.apache.org/jira/browse/SPARK-17471
Project: Spark
Issue Type: New Feature
Components: ML
Reporter: Seth Hendrickson
Vectors in Spark have a {{compressed}} method which selects either sparse or
dense representation by minimizing storage requirements. Matrices should also
have this method, which is now explicitly needed in {{LogisticRegression}}
since we have implemented multiclass regression.
The compressed method should also give the option to store row major or column
major, and if nothing is specified should select the lower storage
representation (for sparse).
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