= Plotting =
* [http://www.pragma-ade.nl/general/manuals/luametafun.pdf LuaMetafun manual](2021)
** [http://www.pragma-ade.nl/general/manuals/luametafun.pdf#page=30 Contours]
** [http://www.pragma-ade.nl/general/manuals/luametafun.pdf#page=41 Surfaces]