gca while using subplots and sgtitle

Hello,

i want to add arrows to the x and y axis of the subplots. This also works:

p = get(gca, 'Position');
anno = annotation('arrow');
anno.HeadStyle = 'plain';
set(anno, 'X', [p(1) p(1)], 'Y', [p(2) p(2)+p(4)]);
anno = annotation('arrow');
anno.HeadStyle = 'plain';
set(anno, 'X', [p(1) p(1)+p(3)], 'Y', [p(2) p(2)]);

If I give the subplots a title with "sgtitle", however, it no longer works and the arrow representation of the x-axis shifts.I would be very grateful for tips on solving the problem.

Many thanks, Manuel

Answer 1

[Cris LaPierre]

It appears to actually be the combination of the plot title and the sgtitle. If you just have one or the other, it works fine. My recommendation would be to add the sgtitle first, then the subplots. This way, when you add the annotation, the axes are in their new position.

I did notice that I had to include a drawnow to force the update before getting the axes position.

figure()
sgtitle('Scenario 1: Test Title')
for c = 1:3
    subplot(1,3,c)
    scatter(randi(5,[1,5])-3,randi(9,[1,5])-5)
    axis([-2 2 -4 4])
    xlabel('x-axis')
    ylabel('y-axis')
    title("P_" + num2str(c))
    drawnow

    p = get(gca, 'Position');
    anno = annotation('arrow');
    anno.HeadStyle = 'plain';
    set(anno, 'X', [p(1) p(1)], 'Y', [p(2) p(2)+p(4)]);
    anno2 = annotation('arrow');
    anno2.HeadStyle = 'plain';
    set(anno2, 'X', [p(1) p(1)+p(3)], 'Y', [p(2) p(2)]);
end

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