Github user MLnick commented on a diff in the pull request:
https://github.com/apache/spark/pull/11989#discussion_r58592767
--- Diff: mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala ---
@@ -329,6 +329,8 @@ private[ml] trait HasFeatureSubsetStrategy extends
Params {
* - "onethird": use 1/3 of the features
* - "sqrt": use sqrt(number of features)
* - "log2": use log2(number of features)
+ * - "(0.0-1.0]": use the specified fraction of features
--- End diff --
I'm wondering if we can simply consolidate the doc into something like:
```
- "n": when n is in the range (0, 1.0], use n * number of features. When n
is in the range (1, number of features), use n features.
```
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