Surface plots are generated using the splot command rather than the plot
command. The style with lines draws a surface made from a grid of lines.
Solid surfaces can be drawn using the style with pm3d.
Usually the surface is displayed at some arbitrary viewing angle,
such that it clearly represents a 3D surface. In this case the X, Y, and Z
axes are all visible in the plot. The illusion of 3D is enhanced by choosing
hidden line removal or depth-sorted surface elements.
See hidden3d (p.
) and the depthorder (p.
) option of set pm3d (p.
).
The splot command can also calculate and draw contour lines corresponding
to constant Z values. These contour lines may be drawn onto the surface
itself, or projected onto the XY plane. See set contour (p.
).
Subsections
Build Daemon
2016-10-24