Given two vectors A and B, I'd like to find all the indices of matched elements of B in A. So if I have:
A=[1 2 1 2 2 3 1];
B=[1 2 3];
output=[1 3 7;2 4 5;6 0 0].
The first row corresponds to find(A==B(1)), and the second row corresponds to find(A==B(2)), etc;
I know this can be done easily with for loop, but looping over the vector B will be really slow as I have a really big vector of A and vector of B with 43200 elements. Moreover, I am doing a long process after this step, so I am looking for solution through vectorization. I tried different approaches, but non gave me all indices! I am not sure if there's solution through vectorization, but I thought I'd ask here.