Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/15552#discussion_r84210373
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/r/MultilayerPerceptronClassifierWrapper.scala
---
@@ -73,6 +75,8 @@ private[r] object MultilayerPerceptronClassifierWrapper
.setStepSize(stepSize)
.setPredictionCol(PREDICTED_LABEL_COL)
if (seed != null && seed.length > 0) mlp.setSeed(seed.toInt)
+ if (initialWeights != null)
mlp.setInitialWeights(Vectors.dense(initialWeights))
--- End diff --
that seems somewhat involved, so it is likely better to not duplicate the
logic on the R side.
we should check here if initialWeights != null its length > 0
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