Plot different functions in the same graph?

Hi,

I would like to plot three function . Is there a way I can fix two of them (in the background) and make the other change every 1 second (for example)?

I mean, if I use "hold on" every second one graphic is added and if I don't use it the ones in the background get delete; I would like to change only one of them.

How should I do?

Answer 1

[Walter Roberson]

plot first function
hold on
plot second function
h3 = plot third function
for t = 1 : whatever
    calculate new X and Y to plot
    set(h3, 'XData', new_X, 'YData', new_Y);
    drawnow();
    pause(time_interval_goes_here)
end

That is, record the returned handle of the plot you want to change, and inside the loop update the properties of that handle instead of making a new plotting call.