After thinking about this a bit, here's what I think the definition of memr should be:
memr=: ] (15!:[EMAIL PROTECTED] [EMAIL PROTECTED])@, 0 0 _1 }.~ # (Though, if 15!:1 handles higher ranked arrays, I should rephrase this memr definition to continue to do so.) -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
