how to remove rows from an array containig elements from another array

Suppose i have a matrix of

a=[1,2; 
   1,3;
   1,4;
   2,12;
   2,15;
   5,7;
   5,8;
   6,98;
   6,99;
   7,8;
   7,9;
   7,11;
   9,14;
   9,16;
   12,18;
   14,20;
   20,35;
   98,102;
   99,204;
  204,300];
I want to remove rows containing elements from array b, do some manipulations  than remove elements of c do smth and than d.

b=[1,2,3,4,12,15,18]
c=[5,7,8,9,14,16,20,35]
d=[6,98,99,102,204,300]

is there a fast and wasy way to do that with built in matlab functions

Answer 1

[Guillaume]

Use the negation of ismember to get the elements of a column of a that are not in b. If you want to do that for both columns of a, you have to call ismember twice.

col1notinb = ~ismember(a(:, 1), b);
col2notinb = ~ismember(a(:, 2), b);
awithoutb = a(col1notinb & col2notinb, :);