The terminology originated in SHARP APL in the 1980s. "Frame" was at times called "outer shape". In some situations, "outer shape" may be a better, more easily understood term. You know, cell shape and outer shape; outer shape is part of the shape; etc.
On Mon, Jan 18, 2016 at 7:19 AM, Jose Mario Quintana < [email protected]> wrote: > I would not be the one arguing for empty frame vs zero frame terminology :) > (thanks for providing the context). > > Regarding frame, I meant it in the sense that Ken Chakahwata did: "to have > a J definition of that fictitious primitive." > > Your executable model can, of course, readily address Ken's question and > other similar questions for specific instances (pointing out, albeit rather > tacitly, that such J definition already existed, was my main reason for > mentioning your article): > > rk =. #@$ > er =. (0:>.(+rk))`(<.rk) @. (0:<:[) > fr =. -@er }. $@] > cs =. -@er {. $@] > > (Y=. i.2 3 4) > 0 1 2 3 > 4 5 6 7 > 8 9 10 11 > > 12 13 14 15 > 16 17 18 19 > 20 21 22 23 > > 3 (er;fr;cs) Y NB. effective rank; frame; cell shape > ┌─┬┬─────┐ > │3││2 3 4│ > └─┴┴─────┘ > > 2 (er;fr;cs) Y NB. effective rank; frame; cell shape > ┌─┬─┬───┐ > │2│2│3 4│ > └─┴─┴───┘ > _1 (er;fr;cs) Y NB. effective rank; frame; cell shape > ┌─┬─┬───┐ > │2│2│3 4│ > └─┴─┴───┘ > > > > On Sun, Jan 17, 2016 at 11:33 PM, Roger Hui <[email protected]> > wrote: > > > I did not define them; Roland Pesch did: Empty Frames in SHARP APL > > <http://www.jsoftware.com/papers/EmptyFrames.htm>, 1986. I did rename > > them > > to "zero frames". Read the 1986 paper and you can decide for yourself > > whether "empty frame" or "zero frame" is the better name. > > > > > > > > On Sun, Jan 17, 2016 at 5:28 PM, Jose Mario Quintana < > > [email protected]> wrote: > > > > > The verb (frame) as well as the Zero Frame concept are defined in [0] > by > > > Roger. > > > > > > [0] Rank and Uniformity > > > http://www.jsoftware.com/papers/rank.htm > > > > > > On Sun, Jan 17, 2016 at 7:11 PM, Ken Chakahwata < > > > [email protected]> wrote: > > > > > > > My guess is that it would help if we could imagine that we had a > > > primitive > > > > called 'frame' in the same way as we have one called 'shape' i.e. $ > > > > Then one way to get to the precise meaning of frame is to have a J > > > > definition of that ficticious primitive. At a guess, this primitive > > > > requires the 'rank' of the cells in order to then return the > > appropriate > > > > frame. > > > > If we have an array of shape (x,y,z), and we stipulate cells of rank > 3, > > > > then the frame is presumably empty? Not sure of this... but anyhow, > > just > > > a > > > > thought... > > > > > > > > Enjoy > > > > ken > > > > > > > > -----Original Message----- > > > > From: Programming [mailto:[email protected]] > On > > > > Behalf Of Henry Rich > > > > Sent: 17 January 2016 23:59 > > > > To: [email protected] > > > > Subject: Re: [Jprogramming] Definition: Frame of an argument > > > > > > > > The terminology I use is an (x by y by z) array of cells, or an array > > of > > > > cells with frame (x,y,z), emphasizing that the frame is a (part of > the) > > > > shape rather than an array. > > > > > > > > Henry Rich > > > > > > > > On 1/17/2016 6:16 PM, Raul Miller wrote: > > > > > Hmm... ok, reviewing > > > > > http://www.jsoftware.com/help/primer/frame_and_cell.htm 'frame' > does > > > > > get used that way. > > > > > > > > > > I was thinking of the frame as having a shape rather than being the > > > > shape. > > > > > > > > > > Then again, since you can think of an array as being (for example) > an > > > > > (x,y,z) frame of cells, I do not think that my interpretation was > > > > > entirely incorrect, either. So I suppose I have gotten myself into > a > > > > > "much ado about nothing" sort of issue. > > > > > > > > > > Thanks, > > > > > > > > > > > > > > ---------------------------------------------------------------------- > > > > 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
