How can I delete numbers in a matrix that is not equal to numbers in another matrix?

I know the title may be a little confusing.Say I have A =[1 2 2 3 3 4 4 ] and B = [2 3 4], how can I make A 'realize ' that there is a number in it different from B and delete it? Is there any simple way to do that? I want to avoid loops......Thanks!

Answer 1

[Lessmann]

Hi,

you can use logical indexing with the 'ismember' function:

 A= A(ismember(A,B))