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 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
