Drawing Contour Lines In MatLab® Effectively(Illustrated Expression)

Contour lines are used generally in most disciplines. But in land surveying, it has a very important place. In Matlab®, you can obtain contour lines as in land surveying and mapping in geography. Here, we explain how to obtain contour lines in Matlab® with the ‘contour()’ command.

How To Use ‘contour()’ Command In Matlab®?

Creating contour lines in Matlab®.

The use of the contour() command to obtain contour lines is very easy in Matlab® like above. To start to create contour lines, you need to create a 3D mesh domain for contour graph with meshgrid() command. In this meshgrid() command you create both 2 vectors that will be used asvariables in polynomials, and axes in the 3D domain to show graphs on it.

We use the meshgrid() command as shown by the red arrow above to obtain 2 vectors and a 3D domain in Matlab®. Then we created a polynomial, which will be the third axis in the 3D domain and also represent the surface of curves in the 3D graph as shown by the green arrow.

To obtain contour lines, type the vector variables inside the contour() command and type the polynomial that is dependent on these two vector variables. In last, type the number, which will be the number of curves in created contour line above in Matlab®.

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We used the clabel() command as shown in the green box above. This will create point values on created contour line in Matlan as shown by blue arrows above. We just typed inside the clabel the variable contour() command.

You can edit your contour line manually in Matlab®. Also, you can add legends, titles, and other required elements into your contour line in Matlab®. Click on the given link and see how to do them.


The use of the contour() command to create contour lines in Matlab® is very easy like above. Do not forget to leave your comments and questions about creating contour lines with contour() command in Matlab®. Your precious feedbacks are very important for us.

This article is prepared for completely educative and informative purposes. Images used courtesy of Matlab®

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