It was more Matrix Divide (dyadic domino) that attracted attention than Matrix Inversion...
Back in 1960s /70s, APL was deemed exceptional in offering primitives for algorithms for which Fortran (say) offered subroutine libraries. Domino was pointed-to as the extreme case. One well-known APL populariser wrote "what other language gives you a built-in linear regression package?" -or words to that effect. AFAICR the sentiment was common among APLers. On Sun, Feb 26, 2012 at 2:32 AM, Dan Bron <j...@bron.us> wrote: > Why would matrix inversion be the "jewel in the crown of APL"? > > -Dan > > > On Feb 25, 2012, at 5:58 PM, Ian Clark <earthspo...@gmail.com> wrote: > >> I'd say any publicity for practical uses of (;:) is good. Even if only >> because it's Alan Turing's 100th anniversary (celebrated this week by >> Nature http://www.nature.com/nature/current_issue.html) >> >> APL's "world-in-a-primitive" is Domino ⌹ (%.) --hailed as the jewel in >> its crown. I was once offered the tapes of the keystroke log of a >> sizeable IBM APL-coding shop for research. In about 5 years, Domino >> had been used precisely twice. On both occasions as the fill char in a >> histogram. >> >> I guess an APL counterpart of (;:) would have suffered the same fate. >> Not many people know how to program a Turing Machine nowadays. (But it >> has a great future in biocomputing.) >> >> On Sat, Feb 25, 2012 at 4:57 PM, David Ward Lambert >> <b49p23t...@stny.rr.com> wrote: >>> >>>> From: Don Guinn <dongu...@gmail.com> >>>> Subject: [Jprogramming] Sequential Machine >>>> To: Programming forum <programming@jsoftware.com> >>>> Message-ID: >>>> <caecakcmyaatsiuxjrt+u4q5bexrqg6utsurksb57m3a_qaj...@mail.gmail.com> >>> >>> I finally decided to "master" sequential machine. The report of my >>> experience is posted in the new vocabulary page >>> http://www.jsoftware.com/jwiki/Vocabulary/semico >>> >>> nuvoc >>> http://www.jsoftware.com/jwiki/ControlNuVoc >>> >>> As always, please enhance, rewrite, whatnot at your will. >>> Is a sequential machine tutorial useful at the >>> Jsoftware Conference - 23/24 July 2012 - Toronto ? >>> >>> >>> ---------------------------------------------------------------------- >>> For information about J forums see http://www.jsoftware.com/forums.htm >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
