default colormap makes little babies cry
Reported by Antoine Monmayrant
The default colormap is particularly ugly for grayplot or contourf.
Just run the example given in the help page of grayplot:
x=-10:10; y=-10:10;m =rand(21,21);
grayplot(x,y,m,rect=[-20,-20,20,20])
t=-%pi:0.1:%pi; m=sin(t)'*cos(t);
clf()
grayplot(t,t,m)
// ... sound of babies crying and eyes bleeding ... //
Now, compare it to what you get when running grayplot with no arguments:
grayplot();