3D Surface Plot Example using Octave

Introduction

In this tutorial, we will learn to plot a 3D Surface plot using Octave. Useful functions to plot in 3D are as follows :

• linspace
• meshgrid
• surf

Code Listing

% 3D Surface Plot Example
 % www.TestingDocs.com
 points = linspace(-3,3,100);
 [x,y] = meshgrid(points,points);
 z= -3./(1+ x.^2 + y.^2);
 surf(x,y,z);
 xlabel("x-axis");
 ylabel("y-axis");
 zlabel("z-axis");
 title("Surface Plot Example - www.TestingDocs.com");

Screenshot

Notes

linspace (start, end, n)

linspace returns a row vector with n linearly spaced elements between the start and end
parameters.

meshgrid(x,y)

meshgrid returns the 2D grid matrices for the passed x and y vectors.

surf

surface mesh is plotted with the output of the meshgrid 2D matrices.

To know more about any function use the doc command in the command window.

>> doc <functionName>

For example, to know more about linspace function usage, type the command :

>> doc linspace

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Octave Tutorial on this website can be found at:
https://www.testingdocs.com/octave-tutorial/

More information on Octave can be found on the official website:
https://www.gnu.org/software/octave/index