Dear list,
in my work as a teacher I often use the packages draw and qdraw for
drawing plots for my students. Sometimes I want to draw proportional
plots (this means that a circle is a circle on the screen and not an
ellipse). Some months ago I succeeded in making such plots with qdraw by
editing the file wgnuplot.ini, where I set the option "GraphSize=800
800". But this is only a provisional solution. Now I found on the
website of Mario Riotorto the following setting:
"set_draw_defaults( grid=true, proportional_axes=xy)"$
After this setting, when I do
wxdraw2d(region(x^2+y^2<1 ,x,-1.5,1.5,y,-1.5,1.5))
I get a circle in the wxMaxima-window. But when I dow
draw2d(region(x^2+y^2<1 ,x,-1.5,1.5,y,-1.5,1.5));
I get an ellipse in the gnuplot-window. When I do
qdraw(ex(x^2,x,-3,3),more(proportional_axes=xy));
I also get a non-proportional plot in the gnuplot-window.
If I don't make the setting proportional_axes=xy, I get proportional
plots with draw and qdraw (due to my GraphSize-setting), but
non-proportional plots with wxdraw2d. I cannot fix this problem because
I don't know the connections between maxima, gnuplot, draw and so on. I
guess that it has to do with my change of the GraphSize option, but I
don't remember the original setting. How can I fix this problem (and if
possible understand the reason).
I use wxMaxima 0.8.6 in Windows XP.
Thanks for any help,
Christian