The issue is that } is an adverb. So, even though V0 } V1 looks like a verb train, it's actually a hook, parsed as (V0}) V1 , which doesn't do what you want.
You're looking for (OLD&=)`(,:&NEW) } . This is one of my very favorite J phrases. -Dan Please excuse typos; composed on a handheld device. -----Original Message----- From: "Shaw, Ewart" <ewart.s...@warwick.ac.uk> Sender: programming-boun...@jsoftware.com Date: Wed, 14 Dec 2011 11:41:41 To: <programming@jsoftware.com> Reply-To: Programming forum <programming@jsoftware.com> Cc: Shaw, Ewart<ewart.s...@warwick.ac.uk> Subject: [Jprogramming] Problem with } I'm trying to recode data using (=&OLD } ,:&NEW) but the following happens both on J7 and J64-602: (3 1 4 1 5 9 = 1) } 3 1 4 1 5 9,:_1 NB. OK 3 _1 4 _1 5 9 (=&1 } ,:&_1) 3 1 4 1 5 9 NB. not OK 9 1 4 1 5 9 _1 _1 _1 _1 _1 _1 A=. (=&1 ; ,:&_1) 3 1 4 1 5 9 NB. check args of } B=. (3 1 4 1 5 9 = 1) ; 3 1 4 1 5 9,:_1 A-:B 1 Any suggestions? (I might be missing something obvious as I've spent much of the night analysing a clinical trial!) Many thanks, Ewart Shaw J.E.H.Shaw http://www.warwick.ac.uk/statsdept ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
