Matlab Plotting problem

Ok, I don't remember exactly how to do this, but I believe it has something to do with the 'erase' property when drawing.

Check out this link:
http://www.mathworks.com/access/hel...-us&q=matlab+plotting+erase&ie=UTF-8&oe=UTF-8

Look at the part:
Erase Modes
...
none — The object is not erased when it is moved.
...


basically you do something like:

Code (Text):

keep_me  = line('color','b','erase','none');
move_me = line('color','r','erase','normal');

keepX = [0 1 2 3 4];
keepY = [0 1 2 3 4];
set(keep_me, 'xdata', keepX, 'ydata', keepY);

moveX = [0 1 2 3 4];
moveY = [1 1 1 1 1];

set(move_me, 'xdata', moveX, 'ydata', moveY);
drawnow;

pause;

moveY = [2 2 2 2 2];

set(move_me, 'xdata', moveX, 'ydata', moveY);
drawnow;

Something like that.... treat that as pseudo code cause I'm trying to remember off the top of my head. I don't remember exactly if you need that drawnow in there, or (to be honest) when to use the drawnow.