comparing two matrix for similar matrix

So i have matrix A and matrix B and i want to create a matrix C with all the terms that are not alike. What ive tried using is ismember which kinda work.

a = [1 2 3];
b = [1 2 3;
     4 5 6;
     7 8 9];
i = ismember(b , a);
c = b(~i)

this yields the fallowing result

c = [ 4 ; 7; 5; 8 ; 6 ;9]

but what i need is

 c = [4 5 6;
     7 8 9]

Answer 1

[Andrei Bobrov]

a = [1 2 3];
b = [1 2 3;
     4 5 6;
     7 8 9];
i = ismember(b , a, 'rows');
c = b(~i,:)

[jesus escareno]

perfect this worked!!!