3D
plot –
Part 4
Different builtin functions to deal with tridimensional graphs.

In this example we make a summarization
of the use of the following 3D plot instructions:
•
meshgrid
•
figure
•
contour3
•
mesh
•
surfc
•
surfl
It is better if you've already read Parts
1 to 3. We're plotting exactly the same 3D 
data
(a function
depending on two variables) using several instructions, so the visualization is
pretty different from each other.
Example:
% cleans the
memory workspace
clc; clear; close all;
% defines the
range of axes x and y
vx = 3 : 0.1 : 3;
vy = vx;
% generates
the powerful grid
[x, y] = meshgrid(vx, vy);
% defines the
function to be plotted
z = 10 ./ (3 + x.^2 + y.^2);
% opens
figure 1 and plots the function using only contours
figure(1)
contour3(x,y,z)
% opens
figure 2 and draws the function using a mesh
figure(2)
mesh(x,y,z)
% opens
figure 3 and draws the function using surface with contours
figure(3)
surfc(x,y,z)
% opens
figure 4 and draws the function using a enlightened surface
figure(4)
surfl(x,y,z)
shading interp
colormap hot
The resulting 3D graphics are:
From
'3D Plot Part 4' to
home
From
'3D Plot
Part 4' to 3D Main

