8ddfa52c20
This adds StringType feature support via OneHotEncoder. As part of this task it was necessary to change RFormula to an Estimator, so that factor levels could be determined from the training dataset. Not sure if I am using uids correctly here, would be good to get reviewer help on that. cc mengxr Umbrella design doc: https://docs.google.com/document/d/10NZNSEurN2EdWM31uFYsgayIPfCFHiuIu3pCWrUmP_c/edit# Author: Eric Liang <ekl@databricks.com> Closes #7574 from ericl/string-features and squashes the following commits: f99131a [Eric Liang] comments 0bf3c26 [Eric Liang] update docs c302a2c [Eric Liang] fix tests 9d1ac82 [Eric Liang] Merge remote-tracking branch 'upstream/master' into string-features e713da3 [Eric Liang] comments 4d79193 [Eric Liang] revert to seq + distinct 169a085 [Eric Liang] tweak functional test a230a47 [Eric Liang] Merge branch 'master' into string-features 72bd6f3 [Eric Liang] fix merge d841cec [Eric Liang] Merge branch 'master' into string-features 5b2c4a2 [Eric Liang] Mon Jul 20 18:45:33 PDT 2015 b01c7c5 [Eric Liang] add test 8a637db [Eric Liang] encoder wip a1d03f4 [Eric Liang] refactor into estimator |
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