Animation delete previous point - MATLAB Answers

Hi

I'm trying to make an animation, where I only display one point at the time, right now the trajectory stays, and I want only one point displayed

any suggestions, i want it to look like this: https://www.youtube.com/watch?v=q1dqIcLi3N0

this is my code so far

      
        x= Ball(:,1);
       
        y= Ball(:,2);
       
        %%
       
        figure
       
        curve = animatedline(
       
        'marker'
       
        ,
       
        '*'
       
        ,
       
        'Color'
       
        ,
       
        'r'
       
        );
       
        set(gca,
       
        'Xlim'
       
        ,[-6000 6000],
       
        'Ylim'
       
        ,[-4000 4000])
       
        for
       
        i= 1:length(Ball)
       
        addpoints(curve,x(i),y(i));
       
        drawnow
       
        end

https://www.mathworks.com/matlabcentral/answers/447498-animation-delete-previous-point#answer_363165

If your task is that simple, I prefer updating the XData and YData rather than using the animatedline method. This is faster and more efficient. Instead of deleting and drawing a new point on each iteration, it merely changes the coordinate value of the point that is already drawn. If this is too fast , you can control the approximate timing by using pause() within the loop to slow it down.

Here's an example (just run this to watch a dot move along a sinusoidal trajectory).

      
        x= 0:0.1:2*pi;
       
        y= sin(x);
       
        figure
       
        ph = plot(x(1), y(1),
       
        'r*'
       
        );
       
        %plot initial point
       
        set(gca,
       
        'Xlim'
       
        ,[0 6.5],
       
        'Ylim'
       
        ,[-1 1])
       
        for
       
        i=1:length(y)
       
        ph.XData = x(i);
       
        %change x coordinate of the point
       
        ph.YData = y(i);
       
        %change y coordinate of the point
       
        drawnow
       
        pause(0.05)
       
        %control speed, if desired
       
        end

If you prefer to use the animatedline method , just insert clearpoints() before you call addpoints().

      
        for
       
        i= 1:length(Ball)
       
        clearpoints(curve)
       
        addpoints(curve,x(i),y(i));
       
        drawnow
       
        end

https://www.mathworks.com/matlabcentral/answers/447498-animation-delete-previous-point#comment_676141

https://www.mathworks.com/matlabcentral/answers/447498-animation-delete-previous-point#comment_676162

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