Un-scale or re-center the scaled or centered Matrix-like object
This function revert a Matrix-like object that is scaled or centered via
scale.default to data with the original scale/center.
numeric matrix(like object).
a matrix that are re-centered or un-scaled, based on the value of attributes "scaled:center" and "scaled:scale" of
x. If neither of those attributes is specified,
x is returned.
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