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

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