How to find similar indices in two vector

I have a data set where one vector, say 'A' is a subset of vector 'B'. For example vector B = [x,y ,z, A,c , d]

Is there a way i can find the indices of A in B ?

Note: Please keep in mind that vector A is of size 13000 X 1 while vector B is of size 55000 X 1

I have tried xcorr, findsignal and strfind and it's not giving intended results

Answer 1

[edward holt]

There is probably a better (faster) way than this. But it seems to work.

A = randi(1,10000,1);
B = zeros(60000,1);

%inserting A somehwere into B
B(45213:55212) = A;


for i = 1:length(B) - length(A)
    if nnz(B(i:i+length(A)-1,:) == A) == length(A)
        index = i;
    end
end

index
%returns starting point of A within B.