the code works well only for few cases when the array dimension is same ,need help when array dimension slightly changes(need to add q till the size of y )

q=mtimes(z,B);

x=plus(Y,q);

figure()

imshow(x)

[Guillaume]

A less obfuscated way to write the exact same code:

q = z * B;
x = Y + q;
figure;
imshow(x);

I have no idea what your question is. Please explain the problem you're having in details.