3-D Visualization - The MathWorks - #19

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Text version of the page
Representing a Matrix as a Surface
Representing a Matrix as a Surface
In this section...
"Functions for Plotting Data Grids" on page 1-7
"Mesh and Surface Plots" on page 1-8
"Visualizing Functions of Two Variables" on page 1-8
"Surface Plots of Nonuniformly Sampled Data" on page 1-10
"Parametric Surfaces" on page 1-12
"Hidden Line Removal" on page 1-14
Functions for Plotting Data Grids
MATLAB® graphics software defines a surface by the ^-coordinates of points above a rectangular grid in the x-y plane. The plot is formed by joining adjacent points with straight lines. Surface plots are useful for visualizing matrices that are too large to display in numerical form and for graphing functions of two variables.
MATLAB can create different forms of surface plots. Mesh plots are wire-frame surfaces that color only the lines connecting the defining points. Surface plots display both the connecting lines and the faces of the surface in color. This table lists the various forms.
Function
Used to Create
mesh, surf
Surface plot
meshc, surfe
Surface plot with contour plot beneath it
meshz
Surface plot with curtain plot (reference plane)
pcolor
Flat surface plot (value is proportional only to color)
surfl
Surface plot illuminated from specified direction
surface
Low-level function (on which high-level functions are based) for creating surface graphics objects
1-7

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