7859ab659e
`VectorAssembler` should carry over ML attributes. For unknown attributes, we assume numeric values. This PR handles the following cases: 1. DoubleType with ML attribute: carry over 2. DoubleType without ML attribute: numeric value 3. Scalar type: numeric value 4. VectorType with all ML attributes: carry over and update names 5. VectorType with number of ML attributes: assume all numeric 6. VectorType without ML attributes: check the first row and get the number of attributes jkbradley Author: Xiangrui Meng <meng@databricks.com> Closes #6452 from mengxr/SPARK-7198 and squashes the following commits: a9d2469 [Xiangrui Meng] add space facdb1f [Xiangrui Meng] VectorAssembler should output ML attributes |
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