DataCursormode - Selecting Points on Graph

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T
T 2013-8-13
I attempted to implement this idea:
http://www.mathworks.com/support/solutions/en/data/1-143T59/
However, suppose I want to limit the mouse clicks to a variable
function pick_Callback(hObject, eventdata, handles)
pick = handles.pick %Pick could be any random number
dcm_obj = datacursormode(figure (8));
set(dcm_obj,'DisplayStyle','datatip',...
'SnapToDataVertex','off','Enable','on')
c_info = getCursorInfo(dcm_obj);
if(numel(c_info)==numel(pick))
set(dcm_obj,'Enable','off');
end
For some reason, it allows me to continue selecting points. I want it to stop at numel(pick).

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T
T 2013-8-13
Or suppose I use
[x,y] = ginput(number)
Suppose further that a button initiates this action but the figure appears in a separate window.

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