Github user mengxr commented on a diff in the pull request: https://github.com/apache/spark/pull/1713#discussion_r15718765 --- Diff: mllib/src/main/scala/org/apache/spark/mllib/stat/correlation/Correlation.scala --- @@ -49,43 +49,48 @@ private[stat] trait Correlation { } /** - * Delegates computation to the specific correlation object based on the input method name - * - * Currently supported correlations: pearson, spearman. - * After new correlation algorithms are added, please update the documentation here and in - * Statistics.scala for the correlation APIs. - * - * Maintains the default correlation type, pearson + * Delegates computation to the specific correlation object based on the input method name. */ private[stat] object Correlations { - // Note: after new types of correlations are implemented, please update this map - val nameToObjectMap = Map(("pearson", PearsonCorrelation), ("spearman", SpearmanCorrelation)) - val defaultCorrName: String = "pearson" - val defaultCorr: Correlation = nameToObjectMap(defaultCorrName) - - def corr(x: RDD[Double], y: RDD[Double], method: String = defaultCorrName): Double = { + def corr(x: RDD[Double], + y: RDD[Double], + method: String = CorrelationNames.defaultCorrName): Double = { val correlation = getCorrelationFromName(method) correlation.computeCorrelation(x, y) } - def corrMatrix(X: RDD[Vector], method: String = defaultCorrName): Matrix = { + def corrMatrix(X: RDD[Vector], --- End diff -- Yes. Sorry I didn't see the private tag.
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