[SPARK-15202] add dapplyCollect() method for DataFrame in SparkR

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6.1
• Fix Version/s: 2.0.0
• Component/s: SparkR
• Assignee: Sun Rui
• Reporter: Sun Rui
• Created: 07/May/16 14:02
• Updated: 13/May/16 00:51
• Resolved: 13/May/16 00:51

Description

dapplyCollect() applies an R function on each partition of a SparkDataFrame and collects the result back to R as a data.frame.

The signature of dapplyCollect() is as follows:

  dapplyCollect(df, function(ldf) {...})

R function input: local data.frame from the partition on local node
R function output: local data.frame

Issue Links

• links to: [Github] Pull Request #12989 (sun-rui)