The function I showed to elucidate data routing gave different results for x f^:3 y and (f&y)^:3 x . Division works too:
2 %^:(3) 7 0.285714 (%&7)^:(3) 2 0.0058309 On Sat, 2010-03-20 at 22:37 +0800, [email protected] wrote: > Message: 9 > Date: Sat, 20 Mar 2010 10:36:45 -0400 > From: Raul Miller <[email protected]> > Subject: Re: [Jprogramming] recursive composition > To: Programming forum <[email protected]> > Message-ID: > <[email protected]> > Content-Type: text/plain; charset=ISO-8859-1 > > On Fri, Mar 19, 2010 at 1:43 PM, David Ward Lambert > <[email protected]> wrote: > > ? NB. j programmers MUST understand data flow. > > ? NB. x f^:3 y ?differs from ?(f&y)^:3 x > > To illustrate this we should find an operation which > is not associative and which produces a plausible result > for one of those two cases. > > I can not think of one off the top of my head, > but I know that they exist. > > -- > Raul > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
