Wow!
> On Oct 22, 2019, at 4:00 PM, Raul Miller <rauldmil...@gmail.com> wrote: > > Probably worth noting also that I could have instead said: > > D=: (+|:)>0;1.5;2 1.5;2.5 2 1.5 0 > > This is actually one character shorter than my previous expression... > > Thanks, > > -- > Raul > >> On Tue, Oct 22, 2019 at 2:29 PM <pe...@easthope.ca> wrote: >> >> From: Raul Miller <rauldmil...@gmail.com> >> Date: Tue, 22 Oct 2019 13:29:19 -0400 >>> What do you mean by "more efficient"? (What resource is constrained?) >> >> I listed all 16 elements of the matrix. It being symmetrical with 0s >> on the diagonal, only 6 elements should be needed. Rather than "more >> efficient", better wording might have been "without redundant >> information". I might say "more efficient in use of information". >> >>> That said, if it's code golf, you could do something like this: >> >> I didn't know the term "code golf" but it seems appropriate. >> >>> If you are working on problems where that's not enough to >>> work on your dataset, ... >> >> At present I'm interested only in expressing concepts. Computational >> cost is not a concern at all. >> >>> D=: (+|:)>'';1.5;2 1.5;2.5 2 1.5 0 >>> >>> This relies on the use of two placeholders to help represent the full >>> extent of the array, J's fill mechanism, and addition... >> >> Thanks. Definitely helpful. I could create the matrix in a >> commonplace compiled language without help. Thinking about the >> calculation in J is worthwhile. >> >> Thanks again, ... P. >> >> >> -- >> https://en.wikibooks.org/wiki/Medical_Machines >> Tel: +1 604 670 0140 Bcc: peter at easthope. ca >> >> ---------------------------------------------------------------------- >> 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
