I have a 10000x4 matrix, Idx, where each row contains 4 indices to a logical matrix, A. I would like to set all indices in Idx to true (1) in A. This seems like something that should be possible to do very easy in one single line but I can’t quite figure it out so I’m currently doing it by looping:
A = false(10000,256);
for i = 1 : size(A,1)
A(i,Idx(i,:)) = true;
which is very slow. Could someone tell me how to do this indexing without a loop?