Hi, I have defined a verb like so:
phi=: 3 : 'y%#(>:i.y)-.,(>:i.y)*/(y$q:y)' It seems I can only use with atoms, e.g. phi 6 3 What I want to be able to do, is apply this verb to a list. I would also like to know how I can define verbs so they can be more flexible in this way in a general sense. This is the output of my failed attempt: phi i.6 |domain error: phi | y%#(>:i.y)-.,(>:i.y)*/(y$ q:y) I can kind of see where the problems may be, but I can't think how to eradicate them - this is the sort of thing I would usually be just using loop for in a C type language, but I would dearly love to know the best J style approach. Also, I find that these error messages are difficult to interpret - I'm not clear where the error has been found, but I assume the large space has something to do with it (any advice here would be helpful). Thanks in advance. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
