Github user dbtsai commented on a diff in the pull request:
https://github.com/apache/spark/pull/13796#discussion_r74636502
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
---
@@ -944,13 +955,140 @@ class BinaryLogisticRegressionSummary
private[classification] (
private class LogisticAggregator(
private val numFeatures: Int,
numClasses: Int,
- fitIntercept: Boolean) extends Serializable {
+ fitIntercept: Boolean,
+ multinomial: Boolean,
+ standardize: Boolean) extends Serializable {
private var weightSum = 0.0
private var lossSum = 0.0
+ private val totalCoefficientLength = {
+ val cols = if (fitIntercept) numFeatures + 1 else numFeatures
+ val rows = if (multinomial) numClasses else math.max(1, numClasses - 1)
+ rows * cols
+ }
+
private val gradientSumArray =
- Array.ofDim[Double](if (fitIntercept) numFeatures + 1 else numFeatures)
+ Array.ofDim[Double](totalCoefficientLength)
--- End diff --
Move it up to previous line.
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