remove values of a matrix from another

Hi,

I have 2 matrices that are just lists of numbers. Matrix "A" is 380x1 and Matrix "B" is 230x1. I am trying to remove all of the numbers that are in "B" from "A". All of the numbers that are in B are in A so that should not be a problem. I have been trying to use

A(B)=[];

That is giving me the error "Index of element to remove exceeds matrix dimensions." I don't understand this since B is smaller than A.

Are there any other ways to do this?

Thanks in advance.

Answer 1

[José-Luis]

 A = A(~ismember(A,B))

Answer 2

[Sara]

If A and B are 1D arrays:

for i = 1:numel(B)
   A(A==B(i)) = [];
end