How should I code for the max value of a slider?

In the GUI that I've created, at the first the user should load a video and after that he should be able to visualize any frame of this video. I want to put a slider that it's max should be the number of the frame of the loaded data, but I don't know how can I code for the max value(to be adapted with the number of the frame each time a file is loaded)...

Answer 1

[David Sanchez]

If N_frames is the number of frames:

set(handles.your_slider,'Max',N_frames);
set(handles.your_slider,'SliderStep',[1/N_frames 1])