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<a name="Application_002ddefined-Data"></a>
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Next: <a href="Object-Groups.html#Object-Groups" accesskey="n" rel="next">Object Groups</a>, Previous: <a href="Callbacks.html#Callbacks" accesskey="p" rel="prev">Callbacks</a>, Up: <a href="Advanced-Plotting.html#Advanced-Plotting" accesskey="u" rel="up">Advanced Plotting</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Application_002ddefined-Data-1"></a>
<h4 class="subsection">15.4.5 Application-defined Data</h4>
<a name="index-application_002ddefined-data"></a>
<p>Octave has a provision for attaching application-defined data to a graphics
handle. The data can be anything which is meaningful to the application, and
will be completely ignored by Octave.
</p>
<a name="XREFsetappdata"></a><dl>
<dt><a name="index-setappdata"></a>Function File: <em></em> <strong>setappdata</strong> <em>(<var>h</var>, <var>name</var>, <var>value</var>)</em></dt>
<dd><p>Set the named application data to <var>value</var> for the object(s) with
handle(s) <var>h</var>. If the application data with the specified name does
not exist, it is created.
</p>
<p><strong>See also:</strong> <a href="#XREFgetappdata">getappdata</a>, <a href="GUI-Utility-Functions.html#XREFguidata">guidata</a>, <a href="Graphics-Objects.html#XREFget">get</a>, <a href="Graphics-Objects.html#XREFset">set</a>, <a href="User_002dDefined-Preferences.html#XREFgetpref">getpref</a>, <a href="User_002dDefined-Preferences.html#XREFsetpref">setpref</a>.
</p></dd></dl>
<a name="XREFgetappdata"></a><dl>
<dt><a name="index-getappdata"></a>Function File: <em><var>value</var> =</em> <strong>getappdata</strong> <em>(<var>h</var>, <var>name</var>)</em></dt>
<dt><a name="index-getappdata-1"></a>Function File: <em><var>appdata</var> =</em> <strong>getappdata</strong> <em>(<var>h</var>)</em></dt>
<dd>
<p>Return the <var>value</var> for named application data for the object(s) with
handle(s) <var>h</var>.
</p>
<p><code>getappdata(<var>h</var>)</code> returns a structure, <var>appdata</var>, whose fields
correspond to the appdata properties.
</p>
<p><strong>See also:</strong> <a href="#XREFsetappdata">setappdata</a>, <a href="GUI-Utility-Functions.html#XREFguidata">guidata</a>, <a href="Graphics-Objects.html#XREFget">get</a>, <a href="Graphics-Objects.html#XREFset">set</a>, <a href="User_002dDefined-Preferences.html#XREFgetpref">getpref</a>, <a href="User_002dDefined-Preferences.html#XREFsetpref">setpref</a>.
</p></dd></dl>
<a name="XREFrmappdata"></a><dl>
<dt><a name="index-rmappdata"></a>Function File: <em></em> <strong>rmappdata</strong> <em>(<var>h</var>, <var>name</var>)</em></dt>
<dd><p>Delete the named application data for the object(s) with
handle(s) <var>h</var>.
</p></dd></dl>
<a name="XREFisappdata"></a><dl>
<dt><a name="index-isappdata"></a>Function File: <em><var>V</var> =</em> <strong>isappdata</strong> <em>(<var>h</var>, <var>name</var>)</em></dt>
<dd><p>Return true if the named application data, <var>name</var>, exists for the
object with handle <var>h</var>.
</p>
<p><strong>See also:</strong> <a href="#XREFgetappdata">getappdata</a>, <a href="#XREFsetappdata">setappdata</a>, <a href="#XREFrmappdata">rmappdata</a>.
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