GitHub user zhengruifeng opened a pull request:
https://github.com/apache/spark/pull/19889
[SPARK-22690][ML] Imputer inherit HasOutputCols
## What changes were proposed in this pull request?
make `Imputer` inherit `HasOutputCols`
## How was this patch tested?
existing tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhengruifeng/spark using_HasOutputCols
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19889.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 #19889
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commit 5881b88cfcee0989ef5e715ce4e243b501b39ec7
Author: Zheng RuiFeng <ruife...@foxmail.com>
Date: 2017-12-05T07:16:32Z
create pr
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