[SPARK-9957][ML][WIP] spark ml trees should filter out 1 category features#8540

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holdenk wants to merge 5 commits intoapache:masterfrom

holdenk:SPARK-9957-spark-ml-trees-should-filter-out-1-category-features

Commits on Aug 30, 2015

Some progress towards not including one category features
holdenk
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Commits on Aug 31, 2015

Fix the test compile
holdenk
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Fix some tests to have the same expected array for active features we would expect, add some scaladoc to clarify numFeatures now that its a bit trixie
holdenk
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Commits on Nov 10, 2015

Merge branch 'master' into SPARK-9957-spark-ml-trees-should-filter-out-1-category-features
holdenk
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Commits on Nov 11, 2015

progress
holdenk
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