[Jprogramming] an interesting plot toy

[bill lam]

cairo requires hared library support. Please see readme.txt of
the cairo addon.

Вс, 19 апр 2015, jprogramming написал(а):
> in jqt and jhs (8.03) uptodate package manager
> 
> 'output cairo' plot i.10 
> |domain error: cairo_image_surface_create 
> |   plotcs=:    cairo_image_surface_create<"0 CAIRO_FORMAT_ARGB32,y
> 
> 
> 
> ----- Original Message -----
> From: bill lam <bbill.lam at gmail.com>
> To: 'Pascal Jasmin' via Programming <programming at jsoftware.com>
> Cc: 
> Sent: Saturday, April 18, 2015 10:43 PM
> Subject: Re: [Jprogramming] an interesting plot toy
> 
> Oh sorry, it should be cairo
> 
> 'output cairo' plot i.10
> 
> available in j803
> 
> Вс, 19 апр 2015, jprogramming написал(а):
> > j802,
> > 
> > I get value error pd_png (or pd_bmp, pd_jpg).  in j6 and jhs too.  j6 has the media addon installed.  I don't think is available in j8, but j8 error messages still say it requires it (when trying to save to other than bmp). 
> > 
> > 'show ; save bmp' plot i.10  NB. or without 'show;' or with 'show; output'
> > 
> > syntax error: qt_bmp 
> > |       ('qt_',type)~(1+#type)}.y
> > 
> > 
> > ----- Original Message -----
> > From: bill lam <bbill.lam at gmail.com>
> > To: 'Pascal Jasmin' via Programming <programming at jsoftware.com>
> > Cc: 
> > Sent: Saturday, April 18, 2015 9:55 PM
> > Subject: Re: [Jprogramming] an interesting plot toy
> > 
> > see output commands of that webpage, eg
> > 
> > 'output png' plot i.10
> > 
> > Вс, 19 апр 2015, jprogramming написал(а):
> > > Bill:
> > > 
> > > I cannot get any of the commands from 
> > > http://www.jsoftware.com/jwiki/Plot/Commands to produce a file or output to clipboard in j802qt, jhs or j6.  When passed to plot command (have not tried pd)
> > > 
> > > David:
> > > Some of the more interesting drawings do remind of spirograph in a shakier universe
> > > 
> > > 90 d 15 15 15 190 15 15
> > > 
> > > other classes don't seem to be possible from the spirograph world
> > > 90 d 1 1 1 178 1 15
> > > and small tweaks bring an inbetween world
> > > 
> > > 90 d 15 15 15 190 15 15 15
> > > 
> > > Maybe a good name for this is spiroturtles
> > > 
> > > Brian:
> > > Adverbs have always had this behavioural subtlety.  Its very powerful, but also essential to understanding how they will behave within locales.  The rule of thumb is if your explicit adverb doesn't refer to x or y and it returns a verb, that verb is tacit
> > > 
> > >   + 1 : 'u' 
> > > + 
> > > 
> > >   + 1 : 'u y' 
> > > + (1 : 'u y') 
> > > 
> > > 
> > > The former "parses away" the adverb.  The latter returns an expression that will be parsed by the caller, and so any names referred in the adverb definition need to exist in caller's locale (likely to crash as its not a normally intended pattern).  But if you don't refer to y, your adverb can refer to names in the locale it is defined in.
> > > 
> > > There is also an efficiency advantage to parsing to a tacit verb, as the resulting expression can be applied at low ranks without any reparsing.
> > > 
> > > 
> > > ----- Original Message -----
> > > From: Brian Schott <schott.brian at gmail.com>
> > > To: Programming forum <programming at jsoftware.com>
> > > Cc: 
> > > Sent: Saturday, April 18, 2015 7:39 PM
> > > Subject: Re: [Jprogramming] an interesting plot toy
> > > 
> > > Pascal,
> > > 
> > > I have been following this thread with some interest, but until just now I
> > > missed your comment that the derivation of the adverb `points` "creates a
> > > tacit verb:". I have never noticed such before, but I have confirmed that
> > > the resulting verb is tacit. My question to all is since when did J start
> > > doing that? I am just wondering how long I have been unaware, but don't
> > > need an exact answer.
> > > 
> > > ​Thanks,​
> > > 
> > > 
> > > On Sat, Apr 18, 2015 at 11:10 AM, 'Pascal Jasmin' via Programming <
> > > programming at jsoftware.com> wrote:
> > > 
> > > > clever stuff thanks,
> > > >
> > > > here is an adverb form for the clock precision function. m is the number
> > > > of points on the clock up to 90 degrees.  The input is structured that way
> > > > so that the requirement that it be a multiple of 4 is removed.
> > > >
> > > >
> > > >
> > > > points =: 1 : '((4*m)|[+{:@]) ,~ (2&{.)@] + (3 : ''|:(,:y|.])(,-)}:y-|i:
> > > > y'' m) {~ (4*m)|[+{:@]'
> > > >
> > > > creates a tacit verb:
> > > >
> > > >   1 points
> > > > (4 | [ + {:@]) ,~ 2&{.@] + (4 2$0 1 1 0 0 _1 _1 0) {~ 4 | [ + {:@]
> > > >
> > > >
> > > > --
> > > (B=)
> > > ----------------------------------------------------------------------
> > > 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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> 
> > 
> > ----------------------------------------------------------------------
> > 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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> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm

-- 
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