Refresh plot for animation

Hello

I would like to animate a pendulum rod with a mass attached through a spring. My question is about animation. Currently I am plotting the mass as a circle, and the rod as a line from origo to the endpoint. I use hold on, but this means I get every line in my animation. But If I do not use hold on it only plots the line and not the mass.

So how do I get a fresh image for every iteration of my loop?

Thanks in advance.

 for N = 2:1000
   hold on
   axis([-2*L1 2*L1 -2*L1 2*L1]);
   plot(bob_pos(1,N),bob_pos(2,N),'o', 'MarkerFaceColor', 'red');           %Plots the moving mass as circle
   plot([0 pend_end_pos(1,N)], [0 pend_end_pos(2,N)], '-');                 %Plots pendulum rod as line from origo to endpoint
   pause(0.025);
 end

Answer 1

[Walter Roberson]

Use the order

plot 1
hold on
plot 2
axis 
hold off 
drawnow()

... There are better ways than this but I am not at my desk at the moment

[Søren Holm-Petersen]

Thanks, worked like a charm.

[Adhavan Kadhiravan]

Thanks a lot