In other words, if you remove the 1+, the "subtle differences" disappear. So the subtle difference is 1+ and 1+ is the subtle difference.
-Dan > On Apr 10, 2014, at 9:32 AM, Dan Bron <[email protected]> wrote: > > These differences can be summed up by saying "J's index origin is zero". > > In particular, since I.y is defined as y#i.#y or (# i.@#)y, the differences > in the phrases you compare boil down to > (i.N)#~ ... > vs > (1+i.N)#~ ... > > That is, the "subtle differences" are all specifically attributable to your > decision to change from J's default index origin zero to index origin one > (ie. all differences are due to that one little 1+...). > > Which origin is appropriate depends on the application, of course, and it is > up to the user (J programmer) to choose. > > > >> On Apr 9, 2014, at 11:56 PM, "Linda Alvord" <[email protected]> wrote: >> >> Some subtle differences. >> >> I.+./0=3 5 |/i.35 >> 0 3 5 6 9 10 12 15 18 20 21 24 25 27 30 33 >> >> (1+i.35)#~+./0=3 5 |/1+i.35 >> 3 5 6 9 10 12 15 18 20 21 24 25 27 30 33 35 >> >> +/I.+./0=3 5 |/i.35 >> 258 >> >> +/(1+i.35)#~+./0=3 5 |/1+ i.35 >> 293 >> >> +/I.+./0=3 5 |/ i.1000000x >> 2.33333e11 >> >> +/(1+i.1000000x)#~+./0x=3 5 |/1 + i.1000000x >> 233334166668 >> >> Linda >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Don Kelly >> Sent: Wednesday, April 09, 2014 7:00 PM >> To: [email protected] >> Subject: Re: [Jprogramming] Euler Project Problem 1 >> >> Nice! I missed the summation part but overall this is much better. >> >> Don Kelly >>> On 09/04/2014 5:06 AM, Nimp O wrote: >>> +./0=3 5 |/ i.1e3 >> >> ---------------------------------------------------------------------- >> 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
