GitHub user sun-rui opened a pull request:
https://github.com/apache/spark/pull/12989
[SPARK-15202][SPARKR] add dapplyCollect() method for DataFrame in SparkR.
## What changes were proposed in this pull request?
dapplyCollect() applies an R function on each partition of a SparkDataFrame
and collects the result back to R as a data.frame.
```
dapplyCollect(df, function(ldf) {...})
```
## How was this patch tested?
SparkR unit tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sun-rui/spark SPARK-15202
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12989.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #12989
----
commit a728af5d73177235f0c79823a4cf50b8f850a9df
Author: Sun Rui <[email protected]>
Date: 2016-05-08T12:01:24Z
[SPARK-15202][SPARKR] add dapplyCollect() method for DataFrame in SparkR.
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