[Jprogramming] rank trouble

[Devon McCormick]

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.parkhouse at 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