cascade simple k means, selects the best k according to calinski-harabasz criterion
analogous to: http://cc.oulu.fi/~jarioksa/softhelp/vegan/html/cascadeKM.html
see Calinski, T.
Get whether to initialize using the probabilistic farthest
first like method of the k-means++ algorithm (rather than
the standard random selection of initial cluster centers).
Set whether to initialize using the probabilistic farthest
first like method of the k-means++ algorithm (rather than
the standard random selection of initial cluster centers).