MATLAB: Difference between two Vectors

Question

I have two arrays

A = [-1 1 -2 1 -1 1 -1 -2 -1 1];
B = [-1 1 1 -1 1 -1 -1 1];

and i am wanting to find all of the values in A that do not appear in B.

So the answer would appear that

values = [-2 -2 ]     % values that are in A but not B
index = [3 8]         % location of 'values' in A

thanks

Answer 1

A = [-1 1 -2 1 -1 1 -1 -2 -1 1];
B = [-1 1 1 -1 1 -1 -1 1];
a=setdiff(A,B)
index=find(ismember(A,a))
values=A(index)