scaleGroups: Center and scale design matrix by groups
Description
For internal use by groupfs
.
Usage
scaleGroups(x, index, center = TRUE, normalize = TRUE)
Arguments
index
Group membership indicator of length p.
center
Center groups, default is TRUE.
normalize
Scale groups by Frobenius norm, default is TRUE.
Value
- x
Optionally centered/scaled design matrix.
- xm
Means of groups in original design matrix.
- xs
Frobenius norms of groups in original design matrix.