I would also go for

=========

stdize

Output:       same as input
Arguments: X (matrix or list)
                  dfcorr  (integer, optional)

dfcorr = 0 (MLE)
dfcorr = 1 (sample standard deviation)

dfcorr = k > 1 (other)
dfcorr = -1 -> centering only

=================

with default k=1. Excellent.

Help remark:

"Returns the standardized version of the data contained in X, scaling each series/column by the sample standard deviation (dfcorr = 1 by default). For dfcorr = -1 each series/column is centered around its sample mean (no scaling)

PS = What about inserting it in the menu? (Add)

Yiannis