How can i add zeros to same specified matrix column and row?

Hi there,

I want to change my array A(5x5) to adding zeros to 4th and 5th columns and rows. So, output of A matrix can be (7x7) matrix.

A=[1,2,3,4,5;

6,7,8,9,10;

11,12,13,14,15;

16,17,18,19,20;

21,22,23,24,25]

to

A = [1,2,3,0,0,4,5;

6,7,8,0,0,9,10;

11,12,13,0,0,14,15;

0,0,0,0,0,0,0;

0,0,0,0,0,0,0;

16,17,18,0,0,19,20;

21,22,23,0,0,24,25]

Answer 1

[madhan ravi]

[m,n] = size(A);
rc = [4,5]; % where to place zeros
N = 2; % 2 columns and rows
b = zeros(m+N,N+n);
R = setdiff(1:m+N,rc);
C = setdiff(1:n+N,rc);
b(R,C) = A % b is your new A

[Selçuk SÜER]

Thanks. It works perfectly.