ColumnTransformation
this is an open thought of trying to make column operations eleganter and perhaps faster
Check out the "see also" section
Author: purangp
Date: 07.03.2004
Time: 20:48:58
ColumnTransformer captures the operations that can be carried out on columns of a matrix
Given a matrix of dimension mxn M -yields-> R ,where R is a row vector of dimension 1xn.