How to plot arrow with data coordinates in Matlab?

Question

I know there is a function named annotation can plot arrows or double arrows. But annotation can only plot in normalized unit. For example:

annotation(\'arro         


        

Answer 1

Even though annotation uses normalized as default units, you can associate these objects to the current axes (gca) and use data units for setting X and Y properties.

Here is an example of plotting a single arrow.

plot(1:10);
ha = annotation('arrow');  % store the arrow information in ha
ha.Parent = gca;           % associate the arrow the the current axes
ha.X = [5.5 5.5];          % the location in data units
ha.Y = [2 8];   

ha.LineWidth  = 3;          % make the arrow bolder for the picture
ha.HeadWidth  = 30;
ha.HeadLength = 30;