Mike -- I said earlier that jios generates a PDF and shows that. If plot's PDF generation is omitting the arrows, then (a) it explains why jios is getting it wrong, and (b) the same error should appear with JQt too.
It'll be Friday before I can investigate this. I'm hoping someone else will get there first. On Mon, 6 Mar 2023 at 08:39, 'Michael Day' via Chat <[email protected]> wrote: > No, not a pdf (as far as I know.) > Just viewmat on a small complex matrix, and NO arrows were shown. > You'll (Ian) know whether a pdf is used in the process! > This was in Jios on my iPad. > > Mike > > On 06/03/2023 08:28, Ian Clark wrote: > > Did I understand you right -- you tried outputting a PDF in JQt, and the > > PDF contained arrows? > > > > On Sat, 4 Mar 2023 at 23:14, 'Mike Day' via Chat <[email protected]> > wrote: > > > >> Yes, I tried in jios too, and was going to ask the forum how to get the > >> arrows, but I then tried it in JQt under Windows on the laptop, where > they > >> did appear, pointing in what appeared to be the correct direction. > >> > >> Mike > >> > >> Sent from my iPad > >> > >>> On 4 Mar 2023, at 22:25, Ian Clark <[email protected]> wrote: > >>> > >>> Jan-Pieter wrote: > >>>> Jios 903.1 gives the same result (i.e. colours, but not arrows). > >>> When I get time I'll look into this. But for now I'll just say that > jios > >>> uses plot/pd to generate a *pdf* of the viewmat pic, which is what it > >>> displays. Generation of the pdf might possibly be corrupt or > incomplete. > >>> > >>> Might there be a font full of arrows missing? (Just a guess). > >>> > >>>> On Thu, 2 Mar 2023 at 14:33, Jan-Pieter Jacobs < > >> [email protected]> > >>>> wrote: > >>>> > >>>> I think Esa is right. > >>>> It's explained with some examples in the viewmat lab, pages > 8/20-12/20. > >>>> > >>>> It does not seem to work on Android though, just returning a blank > >> window > >>>> (while viewmat on real inputs works perfectly). > >>>> > >>>> On the J Playground, it ddes not work either: it just shows the > >> magnitude, > >>>> but not the arrows. Jios 903.1 gives the same result (i.e. colours, > but > >> not > >>>> arrows). > >>>> > >>>> Jan-Pieter > >>>> > >>>>> On Thu, 2 Mar 2023, 14:02 esal, <[email protected]> wrote: > >>>>> > >>>>> I think it represents the angle (phase, argument) of the complex > number > >>>>> while the color is mapped to the magnitude (absolute value, length). > >>>>> > >>>>> Esa > >>>>> > >>>>> On Wed, Mar 1, 2023 at 7:21 PM Michal Wallace < > >> [email protected]> > >>>>> wrote: > >>>>> > >>>>>> What is the word for what the arrows mean in viewmat when you are > >>>> looking > >>>>>> at complex numbers? > >>>>>> > >>>>>> I think that multiplying a number by the arrow's corresponding point > >> is > >>>>>> going to do some kind of shearing (?) in that direction, but can > >>>> someone > >>>>>> help me put this concept into words? > >>>>>> > >>>>>> Thanks! > >>>>>> -Michal > >>>>>> > ---------------------------------------------------------------------- > >>>>>> 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 > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
