Type Members

1.  class GiniCalculator extends ImpurityCalculator[Char]

   Calculate the weighted Gini Impurity: weight * (1 - \sum_j f_j^2), where f_j is the frequency of the jth label

2.  trait ImpurityCalculator[T] extends AnyRef

   Interface for an impurity calculator, which computes an impurity metric to drive a splitter

3.  class MultiImpurityCalculator extends ImpurityCalculator[Array[AnyVal]]

   Compute the impurity of array-valued labels by summing over the impurity of each index on its own

4.  class VarianceCalculator extends ImpurityCalculator[Double]

   Calculat the weighted variance, which is \sum w_i * (x_i - \bar{x})^2, where \bar{x} is the weighted mean of x