param3d : plots parametric curves in 3d space
contour : level curves for a 3d function given by a
matrix
grayplot10 : gray level on a 2d plot
fcontour10 : level curves for a 3d function given by a
function
hist3d : 3d histogram
secto3d : conversion of a surface description from
sector to plot3d compatible data
eval3d : evaluates a function on a regular grid.
(see also feval)