------------ Thank you Devon and Alexander! -. does intersection most elegantly. I shall use it.
On Fri, 1 Jun 2012 12:50:43 -0400 Devon McCormick <devon...@gmail.com> wrote: > You could also do this: > > e ([:~.]-.]-.[) pi > 3 1 2 > pi ([:~.]-.]-.[) e > 2 1 3 > > Without the "nub" gives an arguably more correct answer: > > pi (]-.]-.[) e > 2 1 2 1 3 > e (]-.]-.[) pi > 3 1 1 2 > > /:~"1 e,:pi > 1 1 2 2 3 7 8 8 8 > 1 1 2 3 4 5 5 6 9 > > > On Thu, May 31, 2012 at 10:48 AM, Graham Parkhouse > <graham.parkho...@ntlworld.com> wrote: > > Can anyone help me to understand where I am going wrong? > > > > ? e=: 2 7 1 8 2 8 1 8 3 > > ? pi=: 3 1 4 1 5 9 2 6 5 > > ? isecn=: ([: /:~ [: ~. e. # [)"1 ? ? NB. Intersection of the two > sets > > ? e isecn pi > > 1 2 3 > > ? pi isecn e > > 1 2 3 > > ? isecn/ e,:pi > > 1 2 3 > > ? isecn/"1 e,.pi > > > > > > > > > > > > > > > > > > This last sentence give me 9 blank lines. I expected and wanted 1 2 > 3. Is my > > view of rank and frames too simplistic? > > > > Regards > > > > Graham > > > > --------------------------------------------------------------------- > - > > For information about J forums see > http://www.jsoftware.com/forums.htm > > > > -- > Devon McCormick, CFA > ^me^ at acm. > org is my > preferred e-mail On Fri, 1 Jun 2012 10:35:26 -0700 (PDT) Alexander Mikhailov <avm...@yahoo.com> wrote: > Without the "nub" gives an arguably more correct answer: > > pi (]-.]-.[) e > 2 1 2 1 3 > e (]-.]-.[) pi > 3 1 1 2 > ----- > > Why not > > e ([ -. -.) pi > 2 1 2 1 3 > ? Regards Graham ---------------- ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
