update doc

apache · Oct 31, 2019 · 5689c1e · 5689c1e
1 parent 3fd1892
commit 5689c1e
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
@@ -94,7 +94,8 @@ private[feature] trait QuantileDiscretizerBase extends Params
  * parameter. If both of the `inputCol` and `inputCols` parameters are set, an Exception will be
  * thrown. To specify the number of buckets for each column, the `numBucketsArray` parameter can
  * be set, or if the number of buckets should be the same across columns, `numBuckets` can be
- * set as a convenience.
+ * set as a convenience. Note that in multiple columns case, relative error is applied to all
+ * columns.
  *
  * NaN handling:
  * null and NaN values will be ignored from the column during `QuantileDiscretizer` fitting. This