3-D Contour Graph
Display isolines of a surface in a 3-D view
Plotted Variables
Z) -- plot contour lines of the elements of a matrix, interpreting values as heights with respect to the x-y plane. Matrix must be at least 2-by-2.
X,Y,Z) -- X and Y specify x- and y-axis limits.
More Information
See the contour3 reference page for more information.