draw a rectangle in matlab

To draw a rectangle in MATLAB, you can use the rectangle function. This function creates a filled or unfilled rectangle, depending on the specified parameters. Below is the general syntax:

main.m
rectangle('Position', positionVector)
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The positionVector variable specifies the position and size of the rectangle. It is a four-element vector that contains the [x,y] coordinates of the bottom-left corner of the rectangle and its width and height.

Here is an example code that draws an unfilled rectangle:

main.m
figure;
rectangle('Position', [0 0 5 3]);
axis equal;
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In this example, the rectangle is drawn on a new figure, with its bottom-left corner starting at (0,0) and its sides having lengths of 5 and 3 units, respectively. The axis equal command ensures that the x and y scales are identical, so that the rectangle appears as a true rectangle.

To draw a filled rectangle, you can add a 'FaceColor' property to the rectangle function call. For instance, the following code creates a blue-filled rectangle:

main.m
figure;
rectangle('Position', [0 0 5 3], 'FaceColor', 'b');
axis equal;
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By default, the rectangle function draws the rectangle in the current axes. However, you can specify a different axes as the first input argument to the function, as in rectangle(ax, 'Position', positionVector).