----- Original Message ----- From: "Miller, Raul D" <[EMAIL PROTECTED]> To: "Programming forum" <[email protected]> Sent: Sunday, February 04, 2007 12:00 PM Subject: RE: [Jprogramming] Spare Matrix from Index Matrix
Randy A MacDonald wrote: > > That (4&$.)^:_1 does not return the original table is > > not important to me. > That's not an inverse. Yes, in the same sense that useful applications of #^:_1 and #.^:_1 are not inverses. > > That it returns a useful result is. > Useful for what? I haven't figured that out, but it looks similar to the # and #. cases. > What's wrong with something like > [EMAIL PROTECTED] [:(] #: i.@:>:)>./ > ? Give me a half-hour to decipher it (which some would say is the problem) and I'll tell you. > [...] > Anyways... there's lots of different kinds of "useful". ... therefore I question the need for the scare quotes. ------------------------------------------------------------------------ |\/| Randy A MacDonald | APL: If you can say it, it's done.. (ram) |/\| [EMAIL PROTECTED] | |\ | | The only real problem with APL is that BSc(Math) UNBF'83 | it is "still ahead of its time." Sapere Aude | - Morten Kromberg Natural Born APL'er | Demo website: http://156.34.82.188/ -----------------------------------------------------(INTP)----{ gnat }- ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
