create a circle in a square background in matlab

To create a circle in a square background in MATLAB, you can use the following code:

main.m
% Create a square background
figure;
rectangle('Position', [0 0 1 1], 'EdgeColor', 'black', 'FaceColor', 'white');

hold on;

% Create a circle
rectangle('Position', [0.25 0.25 0.5 0.5], 'Curvature', [1 1], 'EdgeColor', 'red', 'FaceColor', 'blue');

axis equal;
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In this code:

• The first rectangle function creates a white square background of size 1x1 with black outline.
• The second rectangle function creates a circle inside the square by specifying its position (x, y, width, height), setting curvature to [1 1] to make it a circle, and defining the edge color and face color.
• axis equal ensures that the aspect ratio of the plot is equal to properly display the circle in the square background.