How to draw an arrow or triangle

Hello Matlab community, I am trying to draw an arrow. I am using Psychtoolbox and there doesn't seem to be a specific command for arrows or triangles. I know how to draw a line:

 line = [X-3,Y-40,X+3,Y+40];
 Screen('FillRect',window,[200,200,200], line');

So if someone knows the code to draw a triangle I can merge it with the code for a line to draw an arrow. Any help would be greatly appreciated.

Thanks, Brett

Answer 1

Are you aware of the annotation() function?

annotation('line',x,y)
annotation('arrow',x,y)
annotation('doublearrow',x,y)
annotation('textarrow',x,y)
annotation('textbox',[x y w h])
annotation('ellipse',[x y w h])
annotation('rectangle',[x y w h])
annotation(figure_handle,...)

This does not appear to be applicable to the drawing facilities supported by psychtoolbox.

Yes, as Walter said, this did not work.