Constructing matrix elements conditionally (and sequentially)

Hi,

I have two matrices of differing lengths:

A = [1 1 0 1 0 0 1 0 1 0 1] B = [25.4 17.3 11.6 9.2 14.3 15.0]

I want to construct a matrix (C) that is the same length of A, but the 1 values are sequentially replaced by those in matrix B to yield:

C = [25.4 17.3 0 11.6 0 0 9.2 0 14.3 0 15.0]

Can anyone direct me to any relevant functions/methods that can do this?

As an aside, sum(A)==length(B) in all cases. However, sum(A) and length(B) will both vary with each iteration.

Thank you immensely.

Dave

Answer 1

[Roger Stafford]

   C = zeros(size(A));
   C(A>0) = B;

(Note that this will give an error if your assumption that sum(A)==length(B) is not true.)

[D]

Perfect! Thanks, mate.