Description Usage Arguments Details Value
StatByGroup applies a descriptive statistic over the rows of each 
invariance matrix in a list and returns this as a list of named vectors.
| 1 | StatByGroup(matrix.list, stat.function)
 | 
| matrix.list | A list of invariance matrices from 
 | 
| stat.function | The function to apply over rows | 
This function can be used to indicate how invariant each group was with the
other groups, in general (e.g., by setting stat.function = median.
Thus function returns a list of named vectors. Each vector contains 1 element for each group.
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