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3D (surface) plots

[r][rt][width=3in,keepaspectratio]figure_surface+contours 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. [*]). [r][rt][width=3in,keepaspectratio]figure_mapcontours

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2018-08-13