The plots differ in color based on the Z value.
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Have you tried the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_create_a_movie_from_my_MATLAB_figures.3F
If you mean you have a plot from 2 vectors x and y, then you can use the function pause to drawn each point :
plot(x(n),y(n)) pause(N), % where N is numbers of seconds hold on, end
Here is an example from my File Exchange : http://www.mathworks.com/matlabcentral/fileexchange/41579-projectile-motion-in-weak-gravitational-fieldg=3-71-ms%C2%B2
Thank you very much these have both been very helpful as I am just starting up in the matlab world.