The optClust is a simple attempt to set a threshold on where to cut the an hclust tree. The aim is to maximize the number of cluster with multiple-cells while minimizing the number of one-cell clusters.
a cnr bundle
range of tree heights that need to be optimized
Returns a matrix where rows are the heights in the opt.range, and three columns.
One-cell specifies the number of clusters with only one cell, Multi-cell specifyies the number of clusters with multiple cells (>=2), and
A good threshold is one that minimizes the one-cell cluster, and maximizes the
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