How to code a slider in Octave to have interactive plot?

Question

my target is to have a plot that shows Stochastic oscillator on forex market, and in order to validate which parameter is the best one to setup it, I would use a slider to m

Answer 1

Have a look at this demo which will give you an window like that which should answer all your questions:

The relevant parts for your specific questions are:

h.noise_slider = uicontrol ("style", "slider",
                            "units", "normalized",
                            "string", "slider",
                            "callback", @update_plot,
                            "value", 0.4,
                            "position", [0.05 0.25 0.35 0.06]);
....
 noise = get (h.noise_slider, "value");

Be sure to use the Qt toolkit!