Metrics are functions that tell how much information would be
lost for a given reduction in the data. reduce. as_measure() is a
helper function to create new metrics to be used in partitioners.
partitioners can be created with as_partitioner().
measure_std_mutualinfo() assesses information loss by
calculating the standardized mutual information for the target variables.
See mutual_information().
measure_std_mutualinfo(.partition_step)a partition_step object
a partition_step object
Other metrics: as_measure,
measure_icc, measure_min_icc,
measure_min_r2,
measure_variance_explained