When I run the code for the first time, I get this error. However when I run it for a second time my code is able to run through to completion.

`start = pi;points = 250; % decrease to increase speed of marker`

end_ = 0;disc = pi/16;theta = linspace(pi,0,points);rho = sin(theta);theta2 = linspace(0,pi,points);rho2 = -sin(theta2);p = polarscatter(theta(1),rho(1),'o','Filled','red');for i = 0:15 interval = linspace(start+i*disc,end_+i*disc,points); interval2 = linspace(end_+i*disc,start+i*disc,points); polarplot(interval,rho) hold on for k = 2:length(interval) p.XData = interval(k); p.YData = rho(k); drawnow end pause(0.1) polarplot(interval2,rho2) for k = 2:length(interval2) p.XData = interval2(k); p.YData = rho2(k); drawnow end pause(0.1)enddisp('Finished.')

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