Nuno Almeida

Further, if you want labels for each group just do:

label1 = repmat('t1', size(t1));
label2 = repmat('t2', size(t2));
label3 = repmat('t3', size(t3));
group = [label1; label2; label3];

and then use it the same way.

;)

thanks a lot, Anon