I wish I had paid closer attention to #1 2 Linda
-----Original Message----- From: programming-boun...@jsoftware.com [mailto:programming-boun...@jsoftware.com] On Behalf Of km Sent: Monday, February 06, 2012 7:04 PM To: Programming forum Subject: Re: [Jprogramming] Another early morning exercise > I wish I had said: > > The caps in g =: [: % [: # [ block # and % from being used dyadically. The steps in evaluating > > 1 2 g 3 4 5 > 0.5 > > are > > 1 2 [ 3 4 5 > 1 2 > # 1 2 > 2 > % 2 > 0.5 > > Kip Sent from my iPad On Feb 6, 2012, at 2:25 AM, km <k...@math.uh.edu> wrote: > Remember g is [: % [: # [ and the effect of x g y is % # (x [ y) > > Review the diagrams in http://www.jsoftware.com/help/dictionary/dictf.htm > and the comment about [: > > I had a reason for mentioning that # 1 2 is 2 . Then % 2 is 0.5 > > Sent from my iPad > > > On Feb 6, 2012, at 1:19 AM, "Linda Alvord" <lindaalv...@verizon.net> wrote: > >> If what Bill states is correct >> >> Every verb in J is ambivalent determined by its context. If you put a noun >> argument for it, it becomes dyadic. >> >> Then shouldn't the result be >> >> 1 2 g 3 4 5 >> 1 1 >> >> Since >> >> 1 2 % 1 2 >> 1 1 >> >> Linda >> >> -----Original Message----- >> From: programming-boun...@jsoftware.com >> [mailto:programming-boun...@jsoftware.com] On Behalf Of Linda Alvord >> Sent: Monday, February 06, 2012 2:08 AM >> To: 'Programming forum' >> Subject: Re: [Jprogramming] Another early morning exercise >> >> I can see now that [ is a verb. There is still something I do not >> understand about g . >> >> g=: 13 :'%#x' >> g >> [: % [: # [ >> g=: 13 :'%#x' >> x=: 3 4 5 >> #x >> 3 >> %3 >> 0.333333 >> g 3 4 5 >> 0.333333 >> >> That is fine, but look at your example: >> >> 1 2 g 3 4 5 >> 0.5 >> >> How did this happen? >> >> 1 2 [ 3 4 5 >> 1 2 >> %1 2 >> 1 0.5 >> >> What happened to the 1 ? The result should be a list. >> >> Maybe the result should be "I'm only a monadic function and I can't do that. >> >> Linda >> >> -----Original Message----- >> >> From: programming-boun...@jsoftware.com >> [mailto:programming-boun...@jsoftware.com] On Behalf Of Kip Murray >> Sent: Monday, February 06, 2012 12:46 AM >> To: Programming forum >> Subject: Re: [Jprogramming] Another early morning exercise >> >> About [ >> >> 2 [ 3 >> 2 >> [ 3 >> 3 >> >> Thus [ is a verb. In general x [ y is x and [ y is y . >> >> >> About g >> >> # 1 2 >> 2 >> 1 2 g 3 4 5 >> 0.5 >> >> # 3 4 5 >> 3 >> g 3 4 5 >> 0.333333 >> >> >> About f >> >> 0 1 2 # 3 4 5 >> 4 5 5 >> 0 1 2 f 3 4 5 >> 0.25 0.2 0.2 >> >> # 3 4 5 >> 3 >> f 3 4 5 >> 0.333333 >> >> >> Kip >> >> On 2/5/2012 9:32 PM, Linda Alvord wrote: >>> Dave Lambert mentioned to me in a post that I had made a typing error >> typing >>> x instead of y : >>> >>> i=: 13 :'*:@+/x' >>> i i.4 >>> 456976 >>> >>> So, here are two questions: >>> >>> f=: 13 :'%#y' >>> f >>> [: % # >>> g=: 13 :'%#x' >>> g >>> [: % [: # [ >>> >>> Is g a request for a dyadic function or a monadic one? Since the >> results >>> are different, why does g have the right [: before (to the right of) >> two >>> "verbs" if [ represents a noun ? >>> >>> I've often seen this before and wondered about it. >>> >>> Linda >>> -----Original Message----- >>> From: programming-boun...@jsoftware.com >>> [mailto:programming-boun...@jsoftware.com] On Behalf Of Don Guinn >>> Sent: Sunday, February 05, 2012 8:21 AM >>> To: Programming forum >>> Subject: Re: [Jprogramming] Another early morning exercise >>> >>> Don't you need to change the x to y? >>> >>> i=: 13 :'*:@+/y' >>> i i.4 >>> 456976 >>> i=: 3 :'*:@+/y' >>> i i.4 >>> 456976 >>> i=: 3 :'*:@+/x' >>> i i.4 >>> 676 >>> >>> On Sun, Feb 5, 2012 at 5:11 AM, Linda >> Alvord<lindaalv...@verizon.net>wrote: >>> >>>> My goal has been to translate from expressions with @ to ones without >>> it. >>>> >>>> >>>> >>>> f=: 13 :'x?@$y' >>>> >>>> 2 3 f 6 >>>> >>>> 2 4 2 >>>> 3 2 5 >>>> >>>> >>>> >>>> g=: 13 :'x?$y' >>>> >>>> 2 3 g 6 >>>> >>>> |length error: g >>>> | 2 3 g 6 >>>> >>>> >>>> >>>> h=: 13 :'?x$y' >>>> >>>> 2 3 h 6 >>>> >>>> 4 3 1 >>>> 5 0 1 >>>> >>>> >>>> >>>> f >>>> >>>> ?@$ >>>> >>>> h >>>> >>>> [: ? $ >>>> >>>> >>>> >>>> Can you rewrite this without @ ? >>>> >>>> >>>> >>>> i=: 13 :'*:@+/x' >>>> >>>> i i.4 >>>> >>>> 456976 >>>> >>>> >>>> >>>> >>>> >>>> Linda >>>> >>>> ---------------------------------------------------------------------- >>>> 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 >> >> ---------------------------------------------------------------------- >> 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
