NB. j. y ↔ 0j1 * y NB. x j. y ↔ x + j. y f=: 13 :'5|y' f 5 | ] f 4 4 4 j. 0 4 f 4 j. 0 _1
It seems to me that the code for j. fails to recognize that an entire array of numbers has right arguments of 0 and it should then convert the array to "real numbers". If it did that match would be correct. If match compares numbers it must check that both are real or both are imaginary. Probably this is incredibly naïve, but those issues seems to be the problem. Linda Original Message----- From: programming-boun...@jsoftware.com [mailto:programming-boun...@jsoftware.com] On Behalf Of David Mitchell Sent: Sunday, January 22, 2012 4:42 AM To: Programming forum Subject: Re: [Jprogramming] 5|0 1 2 3 4 is not equal to 5|0 1 2 3 4 j.0 It also seems similar to this thread: http://jsoftware.com/pipermail/programming/2011-December/026261.html On 1/22/2012 4:23, Ian Clark wrote: > This has similarities to the issues discussed in: > http://jsoftware.com/pipermail/programming/2011-July/023384.html > > On Sun, Jan 22, 2012 at 8:40 AM, Bo Jacoby<bojac...@yahoo.dk> wrote: >> Equal arguments should give equal function values, but not here. >> >> a=.i.5 >> b=.a j. 0 >> f=. 5&| >> a-:b >> 1 >> (f a)-:(f b) >> 0 >> >> f a >> 0 1 2 3 4 >> f b >> 0 1 2 _2 _1 >> >> -Bo >> ---------------------------------------------------------------------- >> 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
