Convert integer to logical array in MATLAB

Question

I want to convert an integer i to a logical vector with an i-th non-zero element. That can de done with 1:10 == 2, which returns

0              


        

Answer 1

Another way is to use eye and create a logical matrix that is n x n long, then use the indices to index into the rows of this matrix:

n = 10;
ind = [2 5];

E = eye(n,n) == 1;
out = E(ind, :);

We get:

>> out

out =

     0     1     0     0     0     0     0     0     0     0
     0     0     0     0     1     0     0     0     0     0