The following works for me when I run it from Live Editor, though it requires using an external figure since ginput() is not (yet) supported for UIFigures (as of r2019b).
fh = figure();
set(fh, 'Visible','on')
ax = axes(fh);
plot(ax, rand(1,10), rand(1,10), 'o')
xy = ginput(1);
title(ax,sprintf('(%.3f, %.3f)', xy(1),xy(2)))
