assign values from logial vector to a new matrix with the same size

function B = functionA(A)
   B = zeros(size(A));
   D= A>0;
   B = A(D);

I want to assign the values of A that met the condition (>0) to a matrix B of the same size as A. I wand a matrix B with zeros, the same size as A and the values of matrix A. Does anyone has a hint how to do this?

Answer 1

[Arthur Goldsipe]

You can use an indexing variable like D on both the left and right side of an assignment. If I understand your questions, you can get what you want by changing the last line of your sample code to the following:

    B(D) = A(D);

Answer 2

[Jos (10584)]

function B = functionA(A)
   B = A 
   B(~(A>0)) = 0