Return Value

Type: Int32
A int array containing the number of observations (row) in each group.

The number of groups is the length of the returned array. A group contains observations in x that are equal with respect to the method of comparison. If n contains the returned integer array, then the first n[0] rows of the sorted x are group number 1. The next n[1] rows of the sorted x are group number 2, etc. The last n[n.length - 1] rows of the sorted x are group number n.length.