3D Contour Plot

A contour plot is the projection of a three-dimensional surface onto a two-dimensional plane. The values of the fitted surface in terms of the Z variable are depicted either by variously colored and patterned lines or by shades of color (areas) on an X-Y scatterplot.

In order to change the range of values and number of levels used to define the contour or surface, see Surface Specifications.

Equations and smoothing techniques that can be fit to surface graphs are discussed in 3D Graph Surfaces.

See also, Graphs - 3D Contour Plots and the Conceptual Overview for Contour Plots.