GitHub user zhengruifeng opened a pull request:
https://github.com/apache/spark/pull/19963
[SPARK-20849][DOC][FOLLOWUP] Document R DecisionTree - Link Classification
Example
## What changes were proposed in this pull request?
in https://github.com/apache/spark/pull/18067, only the regression example
is linked
this pr link decision tree classification example to the doc
ping @felixcheung
## How was this patch tested?
local build of docs

You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhengruifeng/spark r_examples
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19963.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 #19963
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commit 988cf18aff70fca7a75c1b8f72a73d01d0976c19
Author: Zheng RuiFeng <[email protected]>
Date: 2017-12-13T04:04:49Z
create pr
commit 7bf74d2eaa8521932737ff6a24172f776c75b16a
Author: Zheng RuiFeng <[email protected]>
Date: 2017-12-13T04:49:37Z
update pr
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