[SPARK-18131] Support returning Vector/Dense Vector from backend

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Incomplete
• Component/s: SparkR
• Labels: bulk-closed
• Assignee: Unassigned
• Reporter: Miao Wang
• Created: 27/Oct/16 04:58
• Updated: 21/May/19 04:11
• Resolved: 21/May/19 04:11

Description

For `spark.logit`, there is a `probabilityCol`, which is a vector in the backend (scala side). When we do collect(select(df, "probabilityCol")), backend returns the java object handle (memory address). We need to implement a method to convert a Vector/Dense Vector column as R vector, which can be read in SparkR. It is a followup JIRA of adding `spark.logit`.