Hi Harvey, >> What I'm trying to do is to grab 2 letters at a time in sequence >> through the 6-character combined planetary abbreviations for 3 >> planets. Is there another way?
I think what you want is dyadic \ (Infix https://code.jsoftware.com/wiki/Vocabulary/bslash#dyadic) planets=. 'mevema' _2 [\ planets NB. negative left operand means take n at a time without overlapping me ve ma 2 [\ planets NB. positive left operand means take n at a time with overlapping and potential shards at the end me ev ve em ma you could put any monadic verb that you want in place of the [ (Same), often used with < (Box) _2 <\ planets NB. boxes two at a time without overlapping ┌──┬──┬──┐ │me│ve│ma│ └──┴──┴──┘ Cheers, bob > On Apr 13, 2021, at 03:16, 'Mike Day' via Programming > <[email protected]> wrote: > > My variant: > > j =. 1 > 'mevema' {~ 0 1 + +: j > ve > > I use {~ quite often, possibly thanks to nostalgia for [i] ! > > Mike > > Sent from my iPad > >> On 13 Apr 2021, at 09:14, HH PackRat <[email protected]> wrote: >> >> Hello, all! >> >> I'm stumped and need to know why the following "from" problem occurs >> and how to do what I'd like to do: >> >> No problem when numeric values are used: >> val=. 0 1 { 'mevema' >> me >> val=. 2 3 { 'mevema' >> ve >> >> Problem when formulas are used instead of numeric values: >> j=. 0 [or 1 or 2] >> val=. (2*j) (1+2*j) { 'mevema' >> |syntax error >> | val=. (2*j)(1+(2*j)){'mevema' >> >> Why does "from" work with numeric values but not with formulaic >> versions of those same values for use inside a "for_j" loop to handle >> multiple cases? >> >> What I'm trying to do is to grab 2 letters at a time in sequence >> through the 6-character combined planetary abbreviations for 3 >> planets. Is there another way? (Explicit code only, please, if you >> give any examples.) >> >> I just don't understand why one version works and the other doesn't. >> Any help appreciated! >> >> Harvey >> ---------------------------------------------------------------------- >> 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
