On Sat, Jun 22, 2024 at 11:47:22AM +0200, Ralf Hemmecke wrote:
> It is somewhat related to the production of the book, but it is an issue
> maybe deserves its own thread.
>
> When running
>
> vp:=draw(cos(5*t/8),t=0..16*%pi,coordinates==polar)
>
> the output is the picture from chapter 1.4 of the book.
>
> What bothers me, is the visible red dots. Maybe these points are needed to
> actually draw the curve, but why must they be visible? And even in red? In
> the Jenks&Sutor book the graphics is black and white, but I cannot find
> visible dots.
>
> I can remove the points via
>
> points(vp,1,"off")
>
> but I wonder why the drawing default is not "off".
I agree that without points graphs look nicer. But points may
give valuable information, in particular heavy concentration
of points indicates numerical instability (bad conditioning).
And of course points tell you which values were computed and
which are merely interpolation.
--
Waldek Hebisch
--
You received this message because you are subscribed to the Google Groups
"FriCAS - computer algebra system" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/fricas-devel/ZncW3IYL7jxj2IsO%40fricas.org.
