On Wed, 2007-11-07 at 19:13 +0100, J. Simons wrote: > Is it possible to create contourplots with Maxima 5.9.2 (and wxMaxima > 0.6.4) No. contour_plot was only introduced in a recent version (I think it was 5.12). Version 5.9.2 is already very old; why don't you update to a newer version? Regards, Jaime Villate