"zcbtf89" wrote in message <email@example.com>... > I would like to do the following: > > [C ind] = intersect(A,B); > > Where A(100,1), is a vector with a list of consecutive values from 1 to 1000 in a random order (i.e. value 3 is in row 11), > And B (5,1) is a vector with a shorter list of values all of which occur in A at some location. However there are some repetitions i.e. [1 3 5 5 70] ... > > I would like my output vector 'ind' to account for these repetitions in B, such that the index in A repeats itself. i.e. for the above example ind = [ 1 11 25 25 100]. > > Any help regarding this would be much appreciated, > > Thanks!