make a circle in matlab

To make a circle in Matlab, you can use the rectangle function with the 'curvature' property set to [1 1]. This will create a square with rounded corners, effectively making it a circle.

main.m
% center of the circle
x0 = 0;
y0 = 0;

% radius of the circle
r = 5;

% create a square with rounded corners
rectangle('Position', [x0-r, y0-r, 2*r, 2*r], 'Curvature', [1 1])
axis equal
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Here, the x0 and y0 variables specify the center of the circle, and the r variable specifies the radius. The axis equal command ensures that the plot is displayed with equal aspect ratios, so that the circle is not distorted.