create a smoothed corner rectangle in a figure in matlab

You can create a smoothed corner rectangle in a figure in MATLAB by using the rectangle function with rounded corners.

Here is an example:

main.m
figure;
rectangle('Position', [0.2 0.2 0.6 0.6], 'Curvature', [0.2 0.2], 'FaceColor', 'g');
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This code creates a figure window and adds a rectangle to it using the rectangle function. The Position parameter specifies the position and size of the rectangle as a four-element vector [x y w h], where x and y are the coordinates of the bottom-left corner of the rectangle, and w and h are its width and height. The Curvature parameter specifies the curvature of the rectangle corners as a two-element vector [cx cy], where cx and cy are the curvature values for the x-axis and y-axis, respectively. A value of 0 will produce a sharp corner, and a value of 1 will produce a semi-circle.

The FaceColor parameter specifies the fill color of the rectangle. In this example, the color is set to green.

You can adjust the values of Position, Curvature, and FaceColor to create the desired smoothed corner rectangle.