Wow. How is this exmpalined? Whereas
Q=: _2+?1e6$5 (+/\ -: +/\.&.|.) Q 1 ts '+/\ Q' 0.00822809 4.19546e6 ts '+/\.&.|. Q' 0.0244686 8.39014e6 --- Jose Mario Quintana <[EMAIL PROTECTED]> wrote: > > T=. ?1000$9 > st'(([^:(0=]))/\) T' > 19136 2.13611842 > st'(([^:(0=]))~/\. &. |.) T' > 11200 0.00382534652 > > ((([^:(0=]))/\) -: (([^:(0=]))~/\. &. |.)) T > 1 > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:programming- > > [EMAIL PROTECTED] On Behalf Of Oleg Kobchenko > > Sent: Wednesday, December 13, 2006 12:38 PM > > To: Programming forum > > Subject: Re: [Jprogramming] What a drag > > > > That was a result of posing a question > > "How would a fast C code look like?" and > > then translated to J. > > > > Unfortunately, though it looks nice, it does not > > work fast in J. Whereas >./\ special coded, > > ([^:(0=]))/\ is not, although it is single scan tacit. > > > > As a result, more cumbersome multiscan algorithms > > perform faster. > > > > > > --- ramacd <[EMAIL PROTECTED]> wrote: > > > > > That is truly beautiful. > > > > > > > > > ----- Original Message ----- > > > From: "Oleg Kobchenko" <[EMAIL PROTECTED]> > > > To: "Programming forum" <[email protected]> > > > Sent: Tuesday, December 12, 2006 4:31 AM > > > Subject: RE: [Jprogramming] What a drag > > > > > > > > > > More generally > > > > > > > > ([^:(0=]))/\ 5 4 0 0 5 0 3 0 0 0 7 > > > > 5 4 4 4 5 5 3 3 3 3 7 > > > > > > > > > > > > --- Oleg Kobchenko <[EMAIL PROTECTED]> wrote: > > > > > > > > > How about variation on the theme > > > > > > > > > > >./\ 3 4 0 0 5 0 6 0 0 0 7 > > > > > 3 4 4 4 5 5 6 6 6 6 7 > > > > > > > > > > > > > > > --- Dan Bron <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > Raul wrote: > > > > > > > drag=: {~ [EMAIL PROTECTED] >./\@:* ([EMAIL PROTECTED] 1{.0{.]) > > > > > > > > > > > > Thank you; this is indeed faster; I've replaced my definition > > with > > > > > > yours. However, I was hoping for a solution that would complete > > in > > > > > > about half the time of the solutions I provided. That is, I'd > > like a > > > > > > 2x or 100% speedup; drag is only about 20% faster than drag0 > > on my > > > > > > dataset. > > > > > > > > > > > > Any other lines of attack? > > > > > > > > > > > > -Dan > > > > > > > > > > __________________________________________________________________________ > > __________ > > Need a quick answer? Get one in minutes from people who know. > > Ask your question on www.Answers.yahoo.com > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
