how to animate circle

Hello everyone, I want to write code through a plot function that will draw a circle in red, when half a circle will start counterclockwise and the other half will start clockwise and meet in the middle, thank you all!

Answer 1

[Abdolkarim Mohammadi]

You first draw the single point at the top of the circle. Then you edit the XData and YData properties of the line after a pause. For example:

h = plot (0, 0); 
for i = ...
        h.XData = horzcat (h.XData, NewPointsX); 
        h.YData = horzcat (h.YData, NewPointsY); 
        pause (0.5);
end