I guess Kent was confused partly because the introduction or the page on
rank in DOJ tells only half of the story, the cell. It does not mention
frame or how to assemble the result. The complete story is given in
DOJ part B. Verbs - dictionary/dictb.htm
pay attention to the paragraph starting with,
The shape of a result is the frame ....
The same detail with illustration diagrams should also available in
Henry's JforC, or Sharp APL reference manual, if my memory still serves me
well.
Чтв, 09 Июн 2011, Ian Clark писал(а):
> Thank you, Kent, for posing a newbie question that crystallises the
> essence of Rank ("). And thanks to those who've offered an answer.
>
> I was just about to supply the content for the NuVoc entry on Rank:
> http://www.jsoftware.com/jwiki/Vocabulary/quote
> Your micro-example spotlights exactly what a novice needs to be told
> about it. I shall use it.
>
>
>
> On Wed, Jun 8, 2011 at 10:47 PM, Henry Rich <[email protected]> wrote:
> > You almost had it. I've fixed the error below.
> >
> > Henry Rich
> >
> > On 6/8/2011 5:41 PM, Squint6 wrote:
> >>
> >> Hi,
> >>
> >>
> >> I have just started with J and I have a question concerning rank (I think).
> >>
> >>
> >> I don't understand why the following does what it does:
> >>
> >>
> >> a=. 2 2 $ i.4
> >>
> >>
> >> b=.+/a
> >>
> >>
> >> c=.+/"1 a
> >>
> >>
> >> After executing these lines
> >> a contains
> >> 0 1
> >> 2 3
> >> b contains 2 4 and
> >> c contains 1 5
> >>
> >>
> >> I understand where b is coming from but c's value confuses me. Here's how
> >> my (faulty) reasoning about c=.+/"1 a goes.
> >
> >> The "1 applies to the verb (+/) giving it a rank of 1. Therefore (+/) is
> >> applied to the 1-cells of a,
> >
> >> which I believe are the lists (0 1) and (2 3).
> > ERROR FIXED HERE:
> >>Therefore we have (+/ 0 1) , (+/ 2 3)
> >>
> >>
> >> Thanks.
> >> Kent
> >>
> >>
> >>
> >> ----------------------------------------------------------------------
> >> 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
--
regards,
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