Of course union is (instead of previous) 1 2 3 4 (-. , ]) 3 4 5 6 1 2 3 4 5 6
> From: Oleg Kobchenko <[email protected]> > > Order is irrelevant in sets > > 1 2 3 4 ([ , -.) 3 4 5 6 > 1 2 3 4 1 2 > 1 2 3 4 ([ -. -.) 3 4 5 6 > 3 4 > > > > > > From: Kip Murray > > > > Good, and there is at least one other nice way to do it. > > > > Matthew Brand wrote: > > > u =. ~.@, > > > n =. ~.@(e.#[) > > > 1 2 3 4 u 3 4 5 6 > > > 1 2 3 4 5 6 > > > 1 2 3 4 n 3 4 5 6 > > > 3 4 > > > > > > > > > > > > 2009/7/16 Kip Murray : > > >> The following is easy but interesting. > > >> > > >> A "set" is a numeric vector without repetitions. Provide definitions > > >> for > the > > >> union u and intersection n of two sets: > > >> > > >> 1 2 3 4 u 3 4 5 6 NB. elements of one or the other > > >> 1 2 3 4 5 6 > > >> > > >> 1 2 3 4 n 3 4 5 6 NB. common elements > > >> 3 4 > > >> > > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
