replacing specific elements in a matrix

Dear all,

I have a matrix A of dimension 9126 by 2 and I want to replace the elements (39,2) (39*2,2) , (39*3,2), (39*4,2) and so forth by zero

Is there any simple way to do that.

The matrix is of the form A=[ 1 2; 3 4];

thanks

Answer 1

[Walter Roberson]

A(39:39:end,:) = 0;

[antonet]

Thanks Walter