How to draw good looking arrows in Matlab?

I have been trying to draw arrows in Matlab in my figure but they all look terrible. Also, I want my arrowhead to be a solid triangle, not a V. I tried using the packages available on the Matlab File Exchange: arrow, arrows, arrows3, and probably at least one other one. I even tried manually creating an arrow in the Matlab figure editor, but when I adjust the line width, the arrow looks like this: I used the annotation command to create the arrow above: ``` annotation(gcf,'arrow',[0.621875 0.457916666666667],... [0.205421152030217 0.40755429650614],... 'HeadLength',4,'LineWidth',5); ``` Here's the result trying to use the arrow package available here: Arrow.m (notice how the bottom arrow head is not perpendicular to the line: I even tried the following and here is the result below (notice the terrible looking arrowhead): ``` figure plot(1:10, 1:10) annotation(gcf,'arrow',[0.621875 0.457916666666667],... [0.205421152030217 0.40755429650614],... 'HeadLength',4,'LineWidth',5); ```