[Inkscape-user] Equation Graphing (like geg) in Inkscape?

People,

I would like to able to produce graphs from equations like geg (Graphical Equation Grapher - uses gtk):

http://www.infolaunch.com/~daveb/

A found a suggestion that this is possible in inkscape:

http://wiki.inkscape.org/wiki/index.php/TufteStylePresentation

but I can't find any more info about how to do this - can someone give me some info?

Ideally it would be great for Inkscape to be able to read a script with the list of equations (using some acceptable syntax) and plot them along with axes, grids, area selection, zoom etc. geg has limitations wrt displaying grids, exporting to PDF etc.

It seems that this would be useful addition to Inkscape?

Regards,

Phil.