In MATLAB, we can plot different types of modules like 2d plotting and 3d plotting. In this article, we will see what are the various types of 3D plotting.
- Mesh Plot: A mesh plot is a 3d surface that creates different types of meshes for different types of expression. To create mesh we have to give the values x and y for z, (z= f(x, y)). For plotting the mesh plot it has mesh() which will generate the 3d surface. It has solid edge color but no face color.
Syntax:
mesh(Z)
Example:
% give the input of x and y.
[x,y]= meshgrid(0:0.1:5);
% give the expression for x
% and y for the output in z
z= sin(x).*cos(y);
% mesh() is used for 3D plotting
mesh(z);
Output:
- Surface plot: A surface plot is a 3d surface that creates different types of surfaces for different expressions. To create a surface we have to give the values x and y for z, (z= f(x, y)). For plotting the surface plot it has surf() which will generate the 3d surface. It has solid edge color and solid face color
Syntax:
surf(Z)
Example:
% give the input for x and y
[x,y]= meshgrid(0:0.1:5);
% give the expression for
% x and y for the value of z.
z= sin(x).*cos(y);
% use surf() for the plotting
surf(z)
Output:
- Surface plot(with shading): A surface plot that creates a three-dimensional surface plot that has solid edge colors and solid face colors and also has shading. In surface with shading, we have to give the values x and y for z, (z= f(x, y)). For plotting the surface plot it has surf(z) is used for 3d plotting.
Syntax:
surfl(z)
There are three types of shading available:
- shading flat
- shading faceted
- shading interp
Example:
% give the input for x and y
[x,y]= meshgrid(0:0.1:5);
% give the expression for x and y
% for the value of z
z= sin(x).*cos(y);
% use surfl() for the plotting
% shading faceted is by default
surfl(z)
shading faceted
title('Faceted Shading')
% use shading flat for each mesh
% line segment and face has a
% constant color
surfl(z)
shading flat
title('Flat Shading')
% use shading flat for varies the
% color in each line segment and
% face by interpolating
surfl(z)
shading interp
title('Interpolated Shading')
Output:
- Contour plot: A contour plot is also called a line plot. To plot contour it has x, y variables which are used to give the values for z, (z=f(x, y)). The x and y variables are usually in a grid called meshgrid.
Syntax:
contour(Z)
Example:
% enter the inputs of x and y
[x,y]= meshgrid(0:0.1:5);
% enter the expression using
% x and y
z= sin(x).*cos(y);
% use contour() for plotting
contour3(z,50)
Output:
- Quiver plot: A quiver plot or vector plot is a type of plotting that gives directional components of u, v, w using the cartesian components x, y, and z. For plotting of quiver plot use quiver3().
Syntax:
quiver3(X, Y, Z, U, V, W)
Example:
% give the input value for x,
% y and z
[x,y,z]= meshgrid(0:0.1:5);
% using x, y and z give the
% values for u,v and w
u= sin(x).*cos(y);
v= sin(x).*cos(y);
w= sin(x).*cos(y);
%use quiver3() for 3d plotting
quiver3(x,y,z,u,v,w);
Output:
