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  <td><br><h2>Gallery - Error bars</h2></td>
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  <a href="../doc/Welcome.html"><img src="../doc/ploticus.gif" border=0></a><br>
  <a href="../doc/Welcome.html">Welcome</a> &nbsp; &nbsp;
  <a href="../gallery/index.html">Gallery</a> &nbsp; &nbsp;
  <a href="../doc/Contents.html">Handbook</a> 
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.TH Gallery_-_Error_bars PL "14-SEP-2001   PL www.sgpr.net"

.ig >>
This page contains a series of error bar examples.
If the amount of error has been calculated in
advance, use <a href="../doc/bars.html">proc bars</a>.  If you want
<b>ploticus</b> to compute the mean and standard deviation, use
<a href="../doc/rangebar.html">proc rangebar</a> with the <b>meanmode</b> option.
<p>
<h1><br>Example 1 - vbars prefab</h1>
<a href="../doc/prefab_vbars.html">vbars prefab<br><img src="../prefabs/vbars3.gif"></a>
<br>
The <a href="../doc/prefab_vbars.html">vbars prefab</a>
can create various error bar displays without requiring you to write any script code.
<p>
<h1><br>Example 2 - lines prefab</h1>
<a href="../doc/prefab_lines.html">lines prefab<br><img src="../prefabs/lines3.gif"></a>
<br>
The <a href="../doc/prefab_lines.html">lines prefab</a>
can also create error bars.
<p>
<h1><br>Example 3 - script</h1>
<a href="errbar2.htm">errbar2<br><img src="errbar2.gif"></a>
<br>
Simple example where standard deviation was computed in advance.
<p>
<h1><br>Example 4 - script</h1>
<a href="mouse.htm">mouse<br><img src="mouse.gif"></a>
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Error bars to +/- one standard error were computed in advance.
<p>
<h1><br>Example 5 - script</h1>
<a href="errbar3.htm">errbar3<br><img src="errbar3.gif"></a>
<br>
Simple example where mean and standard deviation were computed by
<b>proc rangebar</b>.
<p>
<h1><br>Example 6 - script</h1>
<a href="errbar5.htm">errbar5<br><img src="errbar5.gif"></a>
<br>
Multiple error bars, showing increased statistical power
as sample size increases.  Values computed externally, in advance.
<p>
<h1><br>Example 7 - script</h1>
<a href="errbar4.htm">errbar4<br><img src="errbar4.gif"></a>
<br>
In this example, <b>proc rangebar</b> computed the means and
standard deviations and displayed them as horizonal error bars.
<p>
<h1><br>Example 8 - script</h1>
<a href="scatterplot10.htm">scatterplot10<br><img src="scatterplot10.gif"></a>
<br>
Error bars in both horizontal and vertical directions for a scatterplot.
<p>
<h1><br>Example 9 - script</h1>
<a href="errbar1.htm">errbar1<br><img src="errbar1.gif"></a>
<br>
A more elaborate example.  <b>proc scatterplot</b> was used to
render points, and <b> proc bars</b> the error bars.  
The standard deviations were computed in advance.
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<a href="Welcome.html">
<img src="../doc/ploticus.gif" border=0></a><br><small>data display engine &nbsp; <br>
<a href="../doc/Copyright.html">Copyright Steve Grubb</a>
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