Changing elements in a MxN matrix

I am trying to get zeros for certain part of a Matrix to zeros

I need this matrix ones that are bolded, underlines, italic "1" to become zeros. I have been trying to figure this out for a while. I tried if statesments for row > 5 and for loops.

4 1 0 1 0 1 0 1 0 1

1 4 1 0 1 0 1 0 1 0

0 1 4 1 0 1 0 1 0 1

1 0 1 4 1 0 1 0 1 0

0 1 0 1 4 1 0 1 0 1

1 0 1 0 1 4 1 0 1 0

0 1 0 1 0 1 4 1 0 1

1 0 1 0 1 0 1 4 1 0

0 1 0 1 0 1 0 1 4 1

1 0 1 0 1 0 1 0 1 4

Here is my code:

inverse = diag(ones(10,1));
inverse = inverse*4;
for col = 1:length(domain-1)
    for row = 1:10
       if row == col
            inverse(row+1,col) = 1;
            inverse(row,col+1) = 1;
       
       elseif mod(row+col,2) == 1
            inverse(row,col) = 1;
       end
    end
end
matrix = inverse(Nx-1,Ny-1)

Answer 1

[per isakson]

Does this help?

%%
matrix  = magic(10);
matrix = triu( matrix,-4 );
matrix = tril( matrix, 4 )

matrix = 10×10

92 99 1 8 15 0 0 0 0 0 98 80 7 14 16 73 0 0 0 0 4 81 88 20 22 54 56 0 0 0 85 87 19 21 3 60 62 69 0 0 86 93 25 2 9 61 68 75 52 0 0 24 76 83 90 42 49 26 33 65 0 0 82 89 91 48 30 32 39 66 0 0 0 95 97 29 31 38 45 72 0 0 0 0 78 35 37 44 46 53 0 0 0 0 0 36 43 50 27 59

%% This is better, it only overwrites the specific diagonals
matrix  = magic(10);
for k = [5,7,9]
    isdiag = diag( true(10-k,1), k );
    matrix( isdiag ) = 0;
    isdiag = diag( true(10-k,1), -k );
    matrix( isdiag ) = 0;
end
matrix

matrix = 10×10

92 99 1 8 15 0 74 0 58 0 98 80 7 14 16 73 0 57 0 41 4 81 88 20 22 54 56 0 70 0 85 87 19 21 3 60 62 69 0 28 86 93 25 2 9 61 68 75 52 0 0 24 76 83 90 42 49 26 33 65 23 0 82 89 91 48 30 32 39 66 0 6 0 95 97 29 31 38 45 72 10 0 94 0 78 35 37 44 46 53 0 18 0 77 0 36 43 50 27 59

I was fooled by your example and used a 10x10 matrix in my demos. Your title says MxN matrix.