Concat elements to a col in a matrix Matlab

Concat elements to a col in a matrix Matlab

I have a matrix A size axb and I loop on each col in this matrix and want
to concatenate 3 values before and three values after. I don't know how
can I do this? I'm using this script but its not working, although if I
worked on rows its fine where I change A(:,1) to A(1,:) it works fine
temp = [2000 0 0 0 A(:,1) 0 0 0 2000]