corrarray: Correlation Arrays and 2-Sample Correlation Matrices
The goal of 'corrarray' is to create a multi-sample
correlation array by combining the correlation matrices of a data set
stratified by a grouping variable.
For two specified levels of the variable, 'corrarray' displays one level's
correlation matrix in the lower triangular matrix and the other level's
correlation matrix in the upper triangular matrix.
Such an output can enable visualization of correlations from two samples
in a single correlation matrix or corrgram.
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