Ellipse - plot an ellipse according to 3 points
You can select 3 points in an existing figure or a new one, and according to your selection - you can draw an ellipse.
The first 2 points are the vertices (the edges of the major / minor axis) and the 3rd point can be every point on the ellipse. In case that the user selects an impossible point (meaning no ellipse can pass through the 3 points), the function returns NaN's and the result in the figure window is just a flat line.
During the code development, I was assisted by Roger Stafford's answer and Wikipedia
http://www.mathworks.com/matlabcentral/answers/86615-how-to-plot-an-ellipse
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Noam Greenboim (2024). Ellipse - plot an ellipse according to 3 points (https://www.mathworks.com/matlabcentral/fileexchange/48569-ellipse-plot-an-ellipse-according-to-3-points), MATLAB Central File Exchange. Recuperado .
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