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    <p><strong>Update:</strong> The following appears to have broken for newer versions (R2015a and newer?), and there is currently no workaround to change the interpreter for data tip text.</p> <hr> <p>For some odd reason, the <a href="https://www.mathworks.com/help/matlab/ref/datacursormode.html" rel="nofollow noreferrer">data cursor tool</a> in MATLAB forcibly sets the data tip text to be displayed literally instead of with TeX/LaTeX interpreting (even if the <a href="https://www.mathworks.com/help/matlab/ref/text-properties.html#property_d0e1002285" rel="nofollow noreferrer">default MATLAB settings</a> say to do so). There also appears to be no way of directly setting text properties via the data cursor mode object properties.</p> <p>However, I've figured out one workaround. If you add the following to the end of your <code>polarlabel</code> function, the text should display properly:</p> <pre><code>set(0,'ShowHiddenHandles','on'); % Show hidden handles hText = findobj('Type','text','Tag','DataTipMarker'); % Find the data tip text set(0,'ShowHiddenHandles','off'); % Hide handles again set(hText,'Interpreter','tex'); % Change the interpreter </code></pre> <h2>Explanation</h2> <p>Every graphics object created in the figure has to have a <a href="https://www.mathworks.com/help/matlab/learn_matlab/understanding-handle-graphics-objects.html" rel="nofollow noreferrer">handle</a>. Objects sometimes have their <a href="https://www.mathworks.com/help/matlab/ref/text-properties.html#property_d0e1005510" rel="nofollow noreferrer"><code>'HandleVisibility'</code> property</a> set to <code>'off'</code>, so their handles won't show up in the list of child objects for their parent object, thus making them harder to find. One way around this is to set the <a href="https://www.mathworks.com/help/matlab/ref/root-properties.html#property_d0e877586" rel="nofollow noreferrer"><code>'ShowHiddenHandles'</code> property</a> of the <a href="https://www.mathworks.com/help/matlab/ref/groot.html" rel="nofollow noreferrer">root object</a> to <code>'on'</code>. This will then allow you to use <a href="https://www.mathworks.com/help/matlab/ref/findobj.html" rel="nofollow noreferrer"><code>findobj</code></a> to find the handles of graphics objects with certain properties. (<strong>Note:</strong> You could also use <a href="https://www.mathworks.com/help/matlab/ref/findall.html" rel="nofollow noreferrer"><code>findall</code></a> and not worry about the <code>'ShowHiddenHandles'</code> setting)</p> <p>Turning on <a href="https://www.mathworks.com/help/matlab/ref/datacursormode.html" rel="nofollow noreferrer">data cursor mode</a> and clicking the plot creates an <a href="https://www.mathworks.com/help/matlab/ref/hggroup.html" rel="nofollow noreferrer">hggroup object</a>, one child of which is the <a href="https://www.mathworks.com/help/matlab/ref/text.html" rel="nofollow noreferrer">text object</a> for the text that is displayed. The above code finds this text object and changes the <a href="https://www.mathworks.com/help/matlab/ref/text-properties.html#property_d0e1002285" rel="nofollow noreferrer"><code>'Interpreter'</code> property</a> to <code>'tex'</code> so that the theta symbol is correctly displayed. </p> <p>Technically, the above code only has to be called once, not every time <code>polarlabel</code> is called. However, the text object doesn't exist until the first time you click on the plot to bring up the data tip (i.e. the first time <code>polarlabel</code> gets called), so the code has to go in the <code>UpdateFcn</code> for the data cursor mode object so that the first data tip displayed has the right text formatting.</p>
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    1. COThanks gnovice, this solution works perfectly! Excellent explanation as well.
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    2. COYou can replace `findobj` with `findall`, which works regardless of `ShowHiddenHandles` property
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      1. USAlexander Kosenkov
 

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