Github user feynmanliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/7166#discussion_r34197267
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixture.scala ---
@@ -192,6 +209,19 @@ class GaussianMixture private (
/** Java-friendly version of [[run()]] */
def run(data: JavaRDD[Vector]): GaussianMixtureModel = run(data.rdd)
+ private def updateWeightsAndGaussians(
+ mean: BDV[Double],
+ sigma: BreezeMatrix[Double],
+ weight: Double,
+ sumWeights: Double): (Double, MultivariateGaussian) = {
+ val mu = mean / weight
+ BLAS.syr(-weight, Vectors.fromBreeze(mu),
+ Matrices.fromBreeze(sigma).asInstanceOf[DenseMatrix])
+ val newWeight = weight / sumWeights
--- End diff --
Discussed on Slack.
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