VERY simple question about adding 2 matrices

Matrix A and B have the same size: 512 x 512 x 105.

I want each element of matrix A to be equal to the corresponding element in matrix B when that element in matrix B is greater than zero.

How can I write this without a for loop?

Thank you very much!!

Answer 1

[Walter Roberson]

A(B>0) = B(B>0);

[Mohsen]

Thanks a lot!! :)