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

 采纳的回答

Wayne King
Wayne King 2012-4-28
x = [10 2 3 5 15 7 8 100 2 10 12 23 20];
x(3:3:end) = [];

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

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