I think you mean Ian Clark's verb??? Thanks,
-- Raul On Wed, Aug 26, 2015 at 2:12 AM, Linda Alvord <lindaalv...@verizon.net> wrote: > If you begin by writing Raul's idea as an explicit definition, J selects a > different choice than his version. However, you can write and explicit > definition to produce his verb. > > f=: 13 :'":".y' > g=: 13 :'":&".y' > > f > [: ": ". > g > ":&". > > f 'z' [z=: 5.13e7 > 51300000 > g 'z' [z=: 5.13e7 > 51300000 > > Linda > > -----Original Message----- > From: programming-boun...@forums.jsoftware.com > [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Ian Clark > Sent: Tuesday, August 25, 2015 11:05 PM > To: programm...@jsoftware.com > Subject: Re: [Jprogramming] Format a floating number without rounding errors > > I guess you mean: > > format=: ":&". > > So simple. And here was me fooling around with 0j300&": and all sorts. > > (I had a blind spot from using 5!:5 to handle a much wider range of > datatypes.) > > > On Wed, Aug 26, 2015 at 3:55 AM, 'Pascal Jasmin' via Programming > <programm...@jsoftware.com> wrote: >> ": seems to work with all your examples, and does 6 decimal places > automagically. >> >> >> ----- Original Message ----- >> From: Ian Clark <earthspo...@gmail.com> >> To: programm...@jsoftware.com >> Cc: >> Sent: Tuesday, August 25, 2015 10:41 PM >> Subject: [Jprogramming] Format a floating number without rounding >> errors >> >> Can anyone tell me how to define a verb: format which returns a >> numeral string for a noun z of datatype: 'floating' which is formally >> identical to the original definition of z, viz >> >> format 'z' [z=: 5.13 >> 5.13 >> format 'z' [z=: 5.13e_7 >> 5.13e_7 >> format 'z' [z=: 5e_7 >> 5e_7 >> format 'z' [z=: 5e_4 >> 0.0005 >> >> Hitherto I've been using 5!:5 -which gives (or exposes) rounding >> errors >> >> format=: 5!:5&< >> format 'z' [z=: 5.13 >> 5.12999999999999989 >> format 'z' [z=: 5.13e_7 >> 5.13000000000000001e_7 >> format 'z' [z=: 5e_7 >> 4.99999999999999977e_7 >> format 'z' [z=: 5e_4 >> 0.00050000000000000001 >> >> I want it to work with the full range of exponents and up to 6 decimal >> places (say) of mantissa. >> >> JVERSION >> Engine: j803/2014-10-19-11:11:11 >> Library: 8.03.13 >> Qt IDE: 1.3.1/5.3.2 >> Platform: Darwin 64 >> Installer: J803 install >> InstallPath: /applications/j64-803 >> ---------------------------------------------------------------------- >> 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 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
