just cbind the cols in the appropriate order:
m.2 = cbind( m.1[,1:5], yourthreecolumns, m.1[,6:ncol(m.1)] )
on 06/24/2008 07:02 AM Daren Tan said the following:
Instead of prepend or append new columns to a matrix, how to insert them to a matrix ? For example, I would like to insert 3 new columns after the 5th column of matrix m.
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