On Oct 17, 1:00 pm, QuantumDream <m.cohomol...@gmail.com> wrote:
> OK, so ,there is the plot_points option, but shouldn't the default
> value of the plot_point be a function of the range?
Maybe I'm wrong, but I don't think the range is nearly as important as
the type of function. Some functions won't require many plot points
even over a very large range (a line, for example) whereas others will
require many, many plot points even over a very small range (sin(1/x)
on [0,1], for example).
regards
john perry
> Anyway, it's not a big deal for me, but maybe for my Calc students :)
>
> Best,
> -M.
>
> On Oct 17, 12:51 pm, QuantumDream <m.cohomol...@gmail.com> wrote:
>
> > I'm running Sage4.1.1 on a 32-bit Ubuntu 9.04 laptop w/ FF, and there
> > is a HUGE difference between the outputs of the following two
> > commands:
>
> > u = var('u')
> > parametric_plot3d( (u*sin(u), u*cos(u), u), (u, 0, 50))
>
> > vs.
>
> > u = var('u')
> > parametric_plot3d( (u*sin(u), u*cos(u), u), (u, 0, 100))
>
> > The first gives what is expected, a smooth helix on the surface of a
> > cone, but the 2nd one gives a highly coarse rendition of that curve.
> > See a pic
> > here:http://www.mediafire.com/imageview.php?quickkey=yeewzcnktix&thumb=5
>
> > Can anyone confirm this?
>
> > Best,
> > -M.
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