[SPARK-5894] Add PolynomialExpansion

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Component/s: ML
• Target Version/s: 1.4.0
• Assignee: Xusen Yin
• Reporter: Xiangrui Meng
• Created: 18/Feb/15 19:37
• Updated: 12/May/15 21:40
• Resolved: 24/Apr/15 07:39

Description

`PolynomialMapper` takes a vector column and outputs a vector column with polynomial feature mapping.

val poly = new PolynomialMapper()
  .setInputCol("features")
  .setDegree(2)
  .setOutputCols("polyFeatures")

It should handle the output feature names properly. Maybe we can make a better name for it instead of calling it `PolynomialMapper`.

Issue Links

• is related to: SPARK-7115 Do not output 1 in PolynomialExpansion
• relates to: SPARK-7581 User guide update for PolynomialExpansion
• links to: [Github] Pull Request #5245 (yinxusen)