Description
R formula drop the first category alphabetically when encode string/category feature. Spark RFormula use OneHotEncoder to encode string/category feature into vector, but only supporting "dropLast" by string/category frequencies. This will cause SparkR produce different models compared with native R.
Attachments
Issue Links
- Is contained by
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SPARK-15540 RFormula and R feature processing improvement umbrella
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- Resolved
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- relates to
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SPARK-14657 RFormula output wrong features when formula w/o intercept
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- Resolved
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- links to
