How do I replace multiples of 4 with a 0 in a magic 4 matrix?

I have googled and tried and done everything I can think of and still can't get this to work. Can someone please help me?

[Noah Franks]

%Solution to P6

disp ('P-6');

res=0;

A=magic(4);

for row=1:4

for col=1:4

if A(mod(A,4)==0)==0

res=mat;

end

end

end

disp(res);

This is my code.

Answer 1

[David Hill]

a=magic(4);
a(mod(a,4)==0)=0;

Answer 2

[Noah Franks]

To the two gentleman who answered my question, it didn't work.

[David Hill]

You need to explain more; because based on your description, the answer works perfectly.

Answer 3

[Cre'Shawn Dabney]

Hey Noah this should be the code. Just incase you didnt get it yet.

disp('P-6');

res=0;

a=0;

for row=1:4

for col=1:4

if mat==mat

a=magic(4);

a(mod(a,4)==0)=0;

end

end

end

disp(a);

[Noah Franks]

This worked perfectly! Thank you SO much! I spent hours over that one area.