Help me with this problem

I want to extract the column and row values if they meet this below condition.I have tried it in two ways

for i=1:4
for j=1:4
if(A(i,j)~=0 && B(i,j)<=5)
  Arraylow=j; %Error- getting A={1,0,3,0}
elseif
ArrayHigh=j;
end
end
Expected Output:Array: {1,1,1,2,2,1,2,2}={1,2}
for 1st row-(1,1),(1,2)
2ndrow-(2,1)(2,2)
3rdrow-nil
4th row-nil

A matrix(4*4):

1 2 0 0

2 1 2 0

0 2 1 2

0 0 2 1

B matrix:

0 5 34 22

5 0 34 21

34 34 0 10

22 21 10 0

Answer 1

[Matthew Eicholtz]

I don't think you need the for-loops here. Try this:

A = [1 2 0 0; 2 1 2 0; 0 2 1 2; 0 0 2 1];
B = [0 5 34 22; 5 0 34 21; 34 34 0 10; 22 21 10 0];

mask = (A~=0) & (B<=5);

If you need to know the rows and columns that meet the criteria, use find:

[rows,cols] = find(mask);