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<a name="Interacting-with-Plots"></a>
<div class="header">
<p>
Next: <a href="Test-Plotting-Functions.html#Test-Plotting-Functions" accesskey="n" rel="next">Test Plotting Functions</a>, Previous: <a href="Printing-and-Saving-Plots.html#Printing-and-Saving-Plots" accesskey="p" rel="prev">Printing and Saving Plots</a>, Up: <a href="High_002dLevel-Plotting.html#High_002dLevel-Plotting" accesskey="u" rel="up">High-Level Plotting</a> &nbsp; [<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>
</div>
<hr>
<a name="Interacting-with-Plots-1"></a>
<h4 class="subsection">15.2.10 Interacting with Plots</h4>

<p>The user can select points on a plot with the <code>ginput</code> function or
select the position at which to place text on the plot with the
<code>gtext</code> function using the mouse.
</p>
<a name="XREFginput"></a><dl>
<dt><a name="index-ginput"></a>: <em>[<var>x</var>, <var>y</var>, <var>buttons</var>] =</em> <strong>ginput</strong> <em>(<var>n</var>)</em></dt>
<dt><a name="index-ginput-1"></a>: <em>[<var>x</var>, <var>y</var>, <var>buttons</var>] =</em> <strong>ginput</strong> <em>()</em></dt>
<dd><p>Return the position and type of mouse button clicks and/or key strokes
in the current figure window.
</p>
<p>If <var>n</var> is defined, then capture <var>n</var> events before returning.
When <var>n</var> is not defined <code>ginput</code> will loop until the return key
<tt class="key">RET</tt> is pressed.
</p>
<p>The return values <var>x</var>, <var>y</var> are the coordinates where the mouse
was clicked in the units of the current axes.  The return value <var>button</var>
is 1, 2, or 3 for the left, middle, or right button.  If a key is pressed
the ASCII value is returned in <var>button</var>.
</p>
<p>Implementation Note: <code>ginput</code> is intenteded for 2-D plots.  For 3-D
plots see the <var>currentpoint</var> property of the current axes which can be
transformed with knowledge of the current <code>view</code> into data units.
</p>
<p><strong>See also:</strong> <a href="#XREFgtext">gtext</a>, <a href="#XREFwaitforbuttonpress">waitforbuttonpress</a>.
</p></dd></dl>


<a name="XREFwaitforbuttonpress"></a><dl>
<dt><a name="index-waitforbuttonpress"></a>: <em></em> <strong>waitforbuttonpress</strong> <em>()</em></dt>
<dt><a name="index-waitforbuttonpress-1"></a>: <em><var>b</var> =</em> <strong>waitforbuttonpress</strong> <em>()</em></dt>
<dd><p>Wait for mouse click or key press over the current figure window.
</p>
<p>The return value of <var>b</var> is 0 if a mouse button was pressed or 1 if a
key was pressed.
</p>
<p><strong>See also:</strong> <a href="GUI-Utility-Functions.html#XREFwaitfor">waitfor</a>, <a href="#XREFginput">ginput</a>, <a href="Terminal-Input.html#XREFkbhit">kbhit</a>.
</p></dd></dl>


<a name="XREFgtext"></a><dl>
<dt><a name="index-gtext"></a>: <em></em> <strong>gtext</strong> <em>(<var>s</var>)</em></dt>
<dt><a name="index-gtext-1"></a>: <em></em> <strong>gtext</strong> <em>({<var>s1</var>, <var>s2</var>, &hellip;})</em></dt>
<dt><a name="index-gtext-2"></a>: <em></em> <strong>gtext</strong> <em>({<var>s1</var>; <var>s2</var>; &hellip;})</em></dt>
<dt><a name="index-gtext-3"></a>: <em></em> <strong>gtext</strong> <em>(&hellip;, <var>prop</var>, <var>val</var>, &hellip;)</em></dt>
<dt><a name="index-gtext-4"></a>: <em><var>h</var> =</em> <strong>gtext</strong> <em>(&hellip;)</em></dt>
<dd><p>Place text on the current figure using the mouse.
</p>
<p>The text is defined by the string <var>s</var>.  If <var>s</var> is a cell string
organized as a row vector then each string of the cell array is written to a
separate line.  If <var>s</var> is organized as a column vector then one string
element of the cell array is placed for every mouse click.
</p>
<p>Optional property/value pairs are passed directly to the underlying text
objects.
</p>
<p>The optional return value <var>h</var> is a graphics handle to the created
text object(s).
</p>
<p><strong>See also:</strong> <a href="#XREFginput">ginput</a>, <a href="Plot-Annotations.html#XREFtext">text</a>.
</p></dd></dl>


<p>More sophisticated user interaction mechanisms can be obtained using the
ui* family of functions, see <a href="UI-Elements.html#UI-Elements">UI Elements</a>.
</p>
<hr>
<div class="header">
<p>
Next: <a href="Test-Plotting-Functions.html#Test-Plotting-Functions" accesskey="n" rel="next">Test Plotting Functions</a>, Previous: <a href="Printing-and-Saving-Plots.html#Printing-and-Saving-Plots" accesskey="p" rel="prev">Printing and Saving Plots</a>, Up: <a href="High_002dLevel-Plotting.html#High_002dLevel-Plotting" accesskey="u" rel="up">High-Level Plotting</a> &nbsp; [<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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