function output_txt  = labeldtips(obj,event_obj,hdt)
% Display an observation's Y-data and label for a data tip
% obj          Currently not used (empty)
% event_obj    Handle to event object
dcs=hdt.DataCursors;
pos = get(event_obj,'Position');
set(dcs(1),'Position',pos);
output_txt{1} = ['X: ', num2str(pos(1))];
output_txt{2} = ['Y: ', num2str(pos(2))];