GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/12207
[SPARK-14432][SQL] Add API to calculate the approximate quantiles for
multiple columns
## What changes were proposed in this pull request?
JIRA: https://issues.apache.org/jira/browse/SPARK-14432
As we have the underlying implementation to calculate the approximate
quantiles for multiple columns, I think we have no reason only providing API to
calculate the approximate quantiles for just one column at a time. We should
add API to do multiple columns too.
## How was this patch tested?
Add tests to `DataFrameStatSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/viirya/spark-1 multi-cols-approxquantile
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12207.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 #12207
----
commit a8f1b331881a907ce4b82ada3dc077471a8f6271
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-04-06T14:22:18Z
Add API to compute approxQuantile for multiple columns.
commit 47d52b9f12cf30978b966c970261baffb48cd45c
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-04-06T14:27:11Z
Add comment.
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