MATLAB: How to delete some rows of a matrix

Question

Hi. Suppose I have matrix A e.g.

 A=[8.2505    4.8825    2.2563    0.0020    0   
    8.2505    4.8825    2.2687    0.0020    1
    8.2505    4.8825    2.2813    0.0020    2
    8.2505    4.9325    2.2813    0.0020    0
    8.2505    4.9325    2.2938    0.0020    3
    8.2755    4.7575    2.2437    0.0020    0
    8.2755    4.7575    2.2563    0.0020    0
    8.2755    4.7575    2.2687    0.0020    2
    8.2755    4.8075    2.2188    0.0020    0
    8.2755    4.8075    2.2313    0.0020    3
    8.2755    4.8075    2.2437    0.0020    1
    8.2755    4.8075    2.2563    0.0010    0
    8.2755    4.8075    2.2687    0.0010    2];

I want to delete the rows that their fifth column values are unequal to 0 and at the end I want to have the new matrix A without these rows.

Thanks a lot.

Answer 1

A = A(A(:,5)==0,:);

or

A(A(:,5)~=0,:) = [];