MATLAB: Advanced logical matrix indexing

Question

Is it possible to use one line of code to achieve the following

given an NxN matrix A construct an N-1xN matrix B where each column _n in B eliminates the _nth element from the _n column in A

e.g.

A = [1 1 1;2 2 2;3 3 3] gives B = [2 1 1;3 3 2]

I can do this in a for-loop, but given MATLAB is really bad at handling these I was hoping there is a faster solution

Thanks,

~K

Answer 1

Another variation of Matt J's approach:

B = A(:);
B(1:(N+1):(N*N)) = [];
B = reshape(B,N-1,N);