Difference between two Vectors

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

[connor]

Further to my original question, i now need to find the difference between two vectors of different sizes , but the terms that are new will not be unique ie,

a = [-1 1 2 -2 1 -1 -2 -2 1 -1 -2 2 -1 1]
b = [-1 1 2 -2 1 -1 1 -1 -2 2 -1 1]

hence the difference between these two vectors are the two -2 terms at the centre of a .

The current code will only find new terms that have not appeared before but not the difference in the vectors.

Appreciate any help, thanks.

Answer 1

[Azzi Abdelmalek]

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)

[connor]

Thanks

[connor]

Further to my original question, i now need to find the difference between two vectors of different sizes , but the terms that are new will not be unique ie,

a = [-1 1 2 -2 1 -1 -2 -2 1 -1 -2 2 -1 1] b = [-1 1 2 -2 1 -1 1 -1 -2 2 -1 1] hence the difference between these two vectors are the two -2 terms at the centre of a .

The current code will only find new terms that have not appeared before but not the difference in the vectors.

Appreciate any help, thanks.

Answer 2

[Andrei Bobrov]

ii = ~ismember(A,B)
values = A(ii)
index = find(ii)