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POHow do I find an annotation handle in MATLAB?
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I'm trying to implement a modified version of <a href="http://www.mathworks.com/matlabcentral/fileexchange/20422-datetick-with-zooming-panning-and-subplots" rel="noreferrer">datetick2</a> from the MATLAB FEX. When plots are zoomed in on a small date range, the day/month/year, etc. isn't shown, depending on the range of times in the plot. I'd like to put a 'dd-mmm-yyyy' formatted starting date as an annotation in the bottom left corner of the figure. No problem, that's done. However, next I want to have it update if the user selects a different date range with the zoom function. Instead of passing more handles, I want to just find the annotation. However, <a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/findobj.html" rel="noreferrer">findobj</a> doesn't seem to work for the hggroup type, which is what annotations fall under. Am I using it wrong? Here's a code example: <pre><code>>> times=now-[50:-5:0]; >> days=times-times(1); >> plot(times,days) >> datetick2() >> xlabel('Date') >> ylabel('Days') >> title('Example') >> initialdate=datestr(min(get(gca,'xlim')),'dd-mmm-yyyy'); >> txt=annotation('textbox', [.01,.01,.1,.05],... 'string', initialdate,... 'Linestyle','none'); >> >> >> findobj('type','hggroup') ans = Empty matrix: 0-by-1 >> get(txt,'type') ans = hggroup >> findobj('type','axes') ans = 270.0034 </code></pre> As you can see, findobj doesn't work, but if I use the handle I defined in the workspace, the type pops right out as <code>hggroup</code>.
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<matlab><object><handle>
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How do I find an annotation handle in MATLAB?
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