Thanks for looking at this. The problem (or maybe I misunderstand) with this solution is that there is no real “c” in the sense that
g c y is the required answer. That is *:`-:`^ (/."1 &. |:) i. 3 5 (where c is the stuff in brackets) doesn’t work. > On 3 May 2019, at 3:58 pm, 'robert therriault' via Programming > <[email protected]> wrote: > > Hi Piet, > > I am not sure how simple it is, but combining Rob's excellent insight on > oblique with Transpose, Under and rank 1 you get this: > > (*:`-:`^ /.)"1 &. |: i. 3 5 > 0 1 4 9 16 > 2.5 3 3.5 4 4.5 > 22026.5 59874.1 162755 442413 1.2026e6 > > The transpose works in this case because the 3 gerunds are applied to each > transposed row and then Under (&.) undoes the transpose to provide the > results in a shape of 3 5 > > Cheers, bob > >> On May 2, 2019, at 10:15 PM, Piet de Jong <[email protected]> wrote: >> >> Thanks! But it doesn’t appear to generalise to applying successive verbs >> in the gerund to successive >>items<< in y. >> >> (I checked the dictionary re /. and it talks of “collections” of y. Not >> sure what that means) >> >> For example if y is i.3 5 then I’d like the first verb in the gerund to >> apply to the first item of y, the second verb to the second item, and so on. >> >> Is there a simple solution for this? >> >>> On 3 May 2019, at 12:35 pm, 'Rob Hodgkinson' via Programming >>> <[email protected]> wrote: >>> >>> Hi Piet, not ignorant at all ! >>> >>> Try using oblique (an obscure feature is that the u in u/. can be a gerund, >>> in which case it is evoked cell wise); >>> >>> g=. *: ` -: `^ >>> y=. 3 1 0 >>> g /. y >>> 9 >>> 0.5 >>> 1 >>> >>> Found in Section 15 of https://www.jsoftware.com/books/pdf/brief.pdf >>> <https://www.jsoftware.com/books/pdf/brief.pdf>. >>> >>> HTH, Regards Rob >>> >>>> On 3 May 2019, at 10:59 am, pietdion <[email protected]> wrote: >>>> >>>> Hopefully not an ignorant question. >>>> >>>> Am looking for a simple (tacit, non complicated) construction (verb? >>>> adverb? conjunction?) “c" that takes a gerund and applies the successive >>>> verbs in the gerund to successive items. >>>> >>>> A simple example is >>>> >>>> g=. *: ` -: `^ >>>> y=. 3 1 0 >>>> g c y >>>> 9 0.5 1 >>>> >>>> What “c” achieves this for arbitrary gerunds g's and y’s? >>>> >>>> I realise this can be done in a variety of explicit ways and with the >>>> agenda construct. All I can come up with is intricate constructions. >>>> Looking for something simple and direct. Seems to have a lot of uses. >>>> ---------------------------------------------------------------------- >>>> 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
