Matlab: changing zero-one index vector to proper index vector

Question

Suppose an index vector in binary like below

Input

1 1 0 0 1 0 1

1 2 3 4 5 6 7

Intended output

1 2 5 7

which denotes nth number to be chosen. So I want to change 1 1 0 0 1 0 1 to 1 2 5 7, is there some easy way for this?

Answer 1

The solution is using the function find(indicesBinary)

Answer 2

If you actually want to use your output to index another vector, do it directly.

You just need to transform your binary vector to logical

A = [1 1 0 0 1 0 1];    %assuming its double
B = [1 2 3 4 5 6 7];

C = B( logical(A) )

C =

     1     2     5     7