Thank you everybody! I was just thinking that, using "1, I was just swapping rows for columns - sloppy thinking; transpose is indeed necessary!
Using [ and ] as test functions on structure is very helpful, like using < to demonstrate partitioning conjunctions. Regards Graham On Thu, May 31, 2012 at 10:48 AM, Graham Parkhouse <graham.parkho...@ntlworld.com> wrote: > 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 ... > 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? ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
