GitHub user petro-rudenko opened a pull request:
https://github.com/apache/spark/pull/5510
[SPARK-6901][Ml]ParamGridBuilder.build with no grids should return an emty
array
ParamGridBuilder.build with no grids returns array with an empty param map.
```scala
assert((new ParamGridBuilder).build().size == 1)
```
I have a logic if ParamGridBuilder is empty - then not use CrossValidator.
It confuses because if the ParamGridBuilder has one grid point in it will also
return an array of size 1:
```scala
assert((new ParamGridBuilder).addGrid(lr.regParam, Array(0.1)).build().size
== 1)
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/petro-rudenko/spark SPARK-6901
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/5510.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 #5510
----
commit 742bd209c7fd5fc82c65a86a1b28de2470db018b
Author: Peter Rudenko <[email protected]>
Date: 2015-04-14T15:12:22Z
[SPARK-6901][Ml]ParamGridBuilder.build with no grids should return an empty
array
----
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