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 --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
