1load("docdraw.mac");
2docdraw3d("figures/draw_logcb",
3	enhanced3d = true,
4	color = green,
5	logcb = true,
6	logz = true,
7	palette = [-15,24,-9],
8	explicit(exp(x^2-y^2), x,-2,2,y,-2,2)
9) $
10