GitHub user ymwdalex opened a pull request:
https://github.com/apache/spark/pull/17137
Correct ML pipeline document
(https://issues.apache.org/jira/browse/SPARK-19797)
Fix the issue SPARK-19797 https://issues.apache.org/jira/browse/SPARK-19797
## What changes were proposed in this pull request?
Description about pipeline in this paragraph is incorrect
https://spark.apache.org/docs/latest/ml-pipeline.html#how-it-works
> If the Pipeline had more **stages**, it would call the
LogisticRegressionModelâs transform() method on the DataFrame before passing
the DataFrame to the next stage.
Reason: Transformer could also be a stage. But only another Estimator will
invoke an extra transform call. The description in the document misleads ML
pipeline users.
## How was this patch tested?
This is a tiny modification of **docs/ml-pipelines.md**. I jekyll build the
modification and check the compiled document.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ymwdalex/spark
SPARK-19797-ML-pipeline-document-correction
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17137.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 #17137
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commit c9037be6250ab6db2f14babc103be478b2e0611a
Author: Zhe Sun <ymwda...@gmail.com>
Date: 2017-03-02T12:25:00Z
This commit fixes the issue
https://issues.apache.org/jira/browse/SPARK-19797
The JIRA issue describes why we need this correct.
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