GitHub user WeichenXu123 opened a pull request:
https://github.com/apache/spark/pull/15435
[SPARK-17139][ML] Add model summary for MultinomialLogisticRegression
## What changes were proposed in this pull request?
Add model summary for MultinomialLogisticRegression.
currently, using `MulticlassMetrics` to do the summary.
because multi-class case has some differences with binary case,
I just expose the `MulticlassMetrics` interface about summary for now.
And I add `findSummaryModelAndPredictionCol` method because the
`MulticlassMetrics` need the `predictionCol` value. Although the
`predictionCol` can be calculated from `probabilityCol`, put some code here to
do this thing will cause repeated code, so I do not use that way.
## How was this patch tested?
Existing tests.
(If this patch involves UI changes, please attach a screenshot; otherwise,
remove this)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/WeichenXu123/spark mlor_summary
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15435.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 #15435
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commit e93740ead908251cebee22cc00059571a6e22a3f
Author: WeichenXu <[email protected]>
Date: 2016-10-11T00:25:45Z
update
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