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Sun Rui b3930f74a0 [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.

Author: Sun Rui <sunrui2016@gmail.com>

Closes #12989 from sun-rui/SPARK-15202.
2016-05-12 17:50:55 -07:00
..
profile [SPARK-13812][SPARKR] Fix SparkR lint-r test errors. 2016-03-13 14:30:44 -07:00
test_support [SPARK-8607] SparkR -- jars not being added to application classpath correctly 2015-06-26 17:06:16 -07:00
tests/testthat [SPARK-15202][SPARKR] add dapplyCollect() method for DataFrame in SparkR. 2016-05-12 17:50:55 -07:00
worker [SPARK-12919][SPARKR] Implement dapply() on DataFrame in SparkR. 2016-04-29 16:41:07 -07:00