Matlab - how to draw pixels on a black full screen?

Question

I want matlab to show me a full screen, all black, and to be able to set pixels on it.

Is it even possible?

Answer 1

Try this:

screen_size = get(0, 'ScreenSize');

buff=zeros(screen_size(3),screen_size(4));

for i=1:50
    buff(screen_size(3)/2-i,screen_size(4)/2+i)=100;

end
f1 = image(buff)
colormap(gray)

set(gcf,'windowstyle','modal');
set(gcf,'OuterPosition', screen_size); 
set(gcf,'position',screen_size); 
set(gcf,'Units','normal', 'outerposition',[0 0 1 1])
set(gca,'Visible', 'Off', 'Position',[0 0 1 1]) 

Use Alt+F4 (or equivalent) to kill the window. I don't fully understand why you have to do it this way, but it is the only way I've ever found to remove the window frame and make the plot extend full screen.