remove index

hi,

how I can remove index 3,6,9,....?

ex.

x=[10 2 3 5 15 7 8 100 2 10 12 23 20];

i need x be

x=[10 2 5 15 8 100 10 12 20];

I do not want use loop

thanks in advance

Answer 1

[Wayne King]

 x = [10 2 3 5 15 7 8 100 2 10 12 23 20]; 
 x(3:3:end) = [];

[Andrei Bobrov]

x(nonzeros((1:numel(x)).*(rem(1:numel(x),3)~=0)))