%% Trace Marker Along Line
% This example shows how to trace a marker along a line by
% updating the data properties of the marker. 

% Copyright 2015 The MathWorks, Inc.


%% 
% Plot a sine wave and a red marker at the beginning of the line. Set the
% axis limits mode to manual to avoid recalculating the limits throughout
% the animation loop.
x = linspace(0,10,1000);
y = sin(x);
plot(x,y)
hold on
p = plot(x(1),y(1),'o','MarkerFaceColor','red');
hold off
axis manual
%%
% Move the marker along the line by updating the |XData| and |YData|
% properties in a loop. Use a <docid:matlab_ref.f56-719157> or |drawnow
% limitrate| command to display the updates on the screen. |drawnow
% limitrate| is fastest, but it might not draw every frame on the screen.

for k = 2:length(x)
    p.XData = x(k);
    p.YData = y(k);
    drawnow 
end

%%
% The animation shows the marker moving along the line.
