On 12/13/2012 10:45 PM, James Cloos wrote:
> It is possible to make:
>
> groovy: log(-1/((%i*y+x)!-(x-%i*y)!)^2);
> plot3d(groovy,[x,-5,15],[y,-5,15],[grid,69,69]);
>
> look more like http://gosper.org/groovy.png
>
> (in terms of shape; any reasonable colours are cool).
>
> (I guessed that mma's ?PlotPoints -> 69? might translate to maxima's
> [grid,69,69], but that only barely an hypothesis.)
>
> The mma plot makes some features easier to see.
>
> -JimC
There are two things that help you visualize the surface in that mma
plot; the lightning method used and the black curves shown only in a few
parts of the surface. We don't have any of those in plot3d, but try with
this, which might be closer to what you want:
plot3d(groovy,[x,-5,15],[y,-5,15],[grid,200,200],[mesh_lines_color,false]);
that plot is very sensitive to the values you choose for grid, so you
will have to try with several different ones.
Cheers,
Jaime