powered by
regr2.plot
persp.plane(x, y, z, persp.out, ...) persp.floor(x, y, z, persp.out, ...) persp.back.wall.x(x, y, z, persp.out, ...) persp.back.wall.y(x, y, z, persp.out, ...)
trans3d
perspp
persp