How to Plot a Circle in Matlab

Details on how to plot a circle in Matlab: https://matrixlab-examples.com/matlab-plot.html

https://matrixlab-examples.com

In this video I’m gonna show you how to plot a circle in Matlab. The method works exactly the same in GNU-Octave, FreeMat, Scilab and Scicoslab.

We’re going to use parametric equations to describe a circumference. You need to remember that in a unit circle, the horizontal value of any point is given by the cosine of the angle, and the vertical value is given by the sine of the same angle.

We need five steps:

The first one is to define the values that we want to consider. With this line of code we have 360 values going from 0 to 2pi.

The second step is to calculate the horizontal values of all the 360 angles that we’re considering.

The third step is to calculate the vertical values of the points that we’re going to plot.

The fourth step is to use the built-in function plot in Matlab to draw our x and y values.

And the last step is just to make sure that the horizontal and vertical values in the plot have the same size.

In summary, we need these 5 lines of code... to produce this circle.