MATLAB: “setdiff” comand usage

Question

when i run this code:

    a=[1 1 2];
    b=[1];
    setdiff(a,b)

i get this:

>> c
ans =
       2

but I want this:

    >> c 
    ans = 
         1  2

What should I do to fix this ?

Answer 1

https://de.mathworks.com/matlabcentral/answers/406227-excluding-one-vector-from-another-vector-with-repetition