I am trying to annotate a bubblechart (R2022b) that is on a semilogy scale. I have a color scheme for the bubbles, and I am trying to create a custom legend showing what the color scheme means. I am having difficulty finding a convenient way to plot a circle and simply place it at a desired location relative to the figure. If I use "rectangle" or annotation("ellipse"), the shape changes if I change the figure dimensions, and I also have to back the numbers out of the axis units. Ideally I would be able to just specify the position using relative width and height values (relative to the figure, 0 to 1) and specify the size with a number of points (or, say, a fraction of the figure width). Am I missing something obvious?
EXAMPLE: Here's the result if I use the annotation command, where I've tweaked the ellipse size to match these particular figure dimensions: (the non-transparent green circle is added by this code)
annotation(gcf,'ellipse',[0.6 0.7 0.04 0.07],'FaceColor',[0 1 0],'LineStyle','none');
And here's what happens if I resize the figure:
I would like to have the green circle stay circular upon resizing the figure.
