*‘... with data labels of the same length as my x and y data vectors.’
That could be the problem. The documentation does not appear to support array arguments for them. See if putting the annotation calls in a loop, with one value for each ‘x’, ‘y’, and ‘labelc’ in every iteration works:
for k = 1:...
a = annotation('textarrow',x(k),y(k),'String',labelc(k));
end
Make necessary changes to be certain ‘labelc’ is addressed correctly so it displays correctly.
(I am currently running a long optimization, and cannot test this approach just now.)
