On Feb 11, 3:53 pm, Jason Grout <[email protected]> wrote:
> Hellen wrote:
> > Is it possible to plot equations like:
>
> > x^2+y^2/4+z^2/9=1 ?
>
> > I know that it can be done if each half is expressed as a function or
> > if it is written in parametric equations, but I was wondering if it is
> > possible to plot any quadratic surface directly.
>
> Carl Witty has written an implicit_plot3d function which would plot the
> equation with the following syntax:
>
> implicit_plot3d(x^2+y^2/4+z^2/9-1, (x,-4,4), (y, -4,4), (z,-4,4))
>
> This patch is almost done. There are a few things that need to be
> finished up on it, but if you'd like to experiment, let us know and we
> can post the current work.
>
> I imagine this will be in Sage in the next month or so (probably in
> release 3.4.1)
>
> Jason
Yes, please post the current work.
Thank you,
Hellen
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