GitHub user yanboliang opened a pull request:
https://github.com/apache/spark/pull/9302
[SPARK-11349] [ML] Support transform string label for RFormula
Currently ```RFormula``` can only handle label with ```NumericType``` or
```BinaryType``` (cast it to ```DoubleType``` as the label of Linear Regression
training), we should also support label of ```StringType``` which is needed for
Logistic Regression (glm with family = "binomial").
For label of ```StringType```, we should use ```StringIndexer``` to
transform it to 0-based index.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yanboliang/spark spark-11349
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9302.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 #9302
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commit 233ce5f3f672b71c20d91b8cbe73d45d615f14f9
Author: Yanbo Liang <[email protected]>
Date: 2015-10-27T14:57:49Z
Support transform string label for RFormula
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