plot a circle in matlab

To plot a circle in Matlab, you can make use of the rectangle function and specify the Curvature property as [1 1]:

main.m
r = 5; % radius of the circle
xCentre = 0; % x-coordinate of the center of the circle
yCentre = 0; % y-coordinate of the center of the circle

rectangle('Position', [xCentre-r, yCentre-r, 2*r, 2*r], 'Curvature', [1 1], 'EdgeColor', 'r', 'LineWidth', 2);
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In this code, r represents the radius of the circle, and xCentre and yCentre represent the coordinates of the center of the circle. The Rectangle function uses x and y coordinates to determine the position of the bounding box around the circle. The Curvature property of the rectangle is set to [1 1] to specify that it should have curved edges, effectively forming the circle. Finally, we set the 'EdgeColor' and 'LineWidth' properties to adjust the color and width of the circle's edge.

The resulting figure will show a circle with a radius of r centered at (xCentre, yCentre).