% Handles


x=linspace(0,10);           % Set up x
y=x.^2;                     % Calculate y
h =plot(x,y);               % draw plot 
hold on                     % Put hold on so things can be added

% Next put a marker at the origin
blobhandle = plot(0,0,'o','markersize',10,'markerfacecolor','k');

for k2 = 1:length(x)
    set(blobhandle,'Xdata',x(k2),'Ydata',y(k2))  % Move marker to next x,y point.
       
    pause(.05)		% Wait 50 millisec.

end