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<title>ploticus: vbars prefab</title>
<body bgcolor=D0D0EE vlink=0000FF>
<br>
<br>
<center>
<table cellpadding=2 bgcolor=FFFFFF width=550><tr>
<td>
<table cellpadding=2 width=550><tr>
<td><br><h2>vbars prefab</h2></td>
<td align=right>
<small>
<a href="../doc/welcome.html"><img src="../doc/ploticus.gif" border=0></a><br>
Version 2.41 Mar2009
</small><br><a href="../doc/prefabs.html">Prefabs</a>
<td></tr></table>
</td></tr>
<td>
<br>
<br>
<title>Manual page for vbars_prefab(PL)</title>
</head>
<body>
<center><a href="prefab_vbars_ex.html">
<img src="../gallery/prefab_img/vbars2thm.gif" border=0>
<img src="../gallery/prefab_img/vbars3thm.gif" border=0>
<br><b>View the vbars prefab examples</a></b><br><br></center>
<p>
<tt>vbars</tt> is a
<a href="prefabs.html">
prefab
</a>
for producing bar graphs with vertical solid bars for one or two groups.<tt> </tt>
Error bars may be added above or below the bar graph, or error bars alone may be rendered
(error bar amounts must be precomputed with this prefab).<tt> </tt>
<p>
Note that several of the other
<a href="prefabs.html">
prefabs
</a>
produce bar graphs.<tt> </tt>
For chronological-based data use the
<a href="prefab_chron.html">
chron prefab.<tt> </tt>
</a>
The
<a href="prefab_compare.html">
compare prefab
</a>
computes means and SD on the fly, and graphs them.<tt> </tt>
<br><br><br>
<h2>Parameters</h2>
<table cellpadding=2 bgcolor=A0A0A0 width=600>
<tr bgcolor=FFFFEC align=center><td><b>Prefab<br>parameter<br>name</td><td>Data type</td>
<td>Default</td><td>Description</td>
<td>Examples<br><small>(ignore line wrapping)</td></tr>
<tr bgcolor=FFFFFF>
<td><b><a href="prefab_stdparms.html">Standard parameters</a></td>
<td> </td>
<td> </td>
<td colspan=2>All of the <a href="prefab_stdparms.html">standard prefab parameters</a> may be used.
You <font color=D00000>must specify</font> <b>data</b> (the name of the input data file).
</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>x</td>
<td><a href="atypes.html#dfield">data field</a></td>
<td><font color=D00000>must be specified</font></td>
<td><nobr>Identifies the data field that will hold</nobr> X component.
By default these are assumed to be categories, but thay can be continuous numeric values
if the <b>xnumeric</b> parameter is specified. </td>
<td><tt>x=2<br><br>x=pmb</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>y<br><br>y2</td>
<td><a href="atypes.html#dfield">data field</a></td>
<td><b>y</b> <font color=D00000>must be specified</font></td>
<td><nobr>Identifies the data field(s) that will hold</nobr> Y component.
Data must be numeric.
If <b>y</b> and <b>y2</b> are specified, two sets of bars will be produced.</td>
<td><tt>y=3<br><br>y=cfr y2=cfl</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>err<br><br>err2</td>
<td><a href="atypes.html#dfield">data field</a></td>
<td> </td>
<td><nobr>Identifies the data field(s) that will hold</nobr> error amount, such as SD.
Data must be numeric.
<td><tt>err=4<br><br>err=cfr_sd err2=cfl_sd</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>color<br><br>color2</td>
<td><a href="color.html">color</a></td>
<td><tt>orange, powderblue</td>
<td>Color of bars.</td>
<td><tt>color=green</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>barwidth</td>
<td><a href="atypes.html#punits">inches or cm</a><br>or<br><tt>line</tt></td>
<td>based on data</td>
<td>Specifies the width of the filled bars. May be given as <tt>line</tt> to produce very thin bars.
The default bar width is not always appropriate.
</td>
<td><tt>barwidth=0.05<br><br>barwidth=line</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>errcolor<br><br>errcolor2</td>
<td><a href="color.html">color</a></td>
<td><tt>black</td>
<td>Color of error bars.</td>
<td><tt>errcolor=gray(0.4)</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>errwidth</td>
<td><a href="atypes.html#punits">inches or cm</a><br>or<br><tt>line</tt></td>
<td>0.08 "</td>
<td>Width of error bar tails.</td>
<td><tt>errwidth=0.1</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>errthick</td>
<td><a href="linedetails.html">line thickness value</a></td>
<td>0.5</td>
<td>The thickness of the error bar lines (default = 0.5)</td>
<td><tt>errthick=1</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>erroneway</td>
<td><tt>yes</tt> or <tt>no</td>
<td><tt>no</td>
<td>Draw one-way upward error bars instead of the usual symmetrical error bars.
Old name: <b>errunder</b></td>
<td><tt>erroneway=yes</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>erronly</td>
<td><tt>yes</tt> or <tt>no</td>
<td><tt>no</td>
<td>If <tt>yes</tt>, render error bars only.
<b>y</b> will control the location of the center of the bar and <b>err</b>
will control the error amount.</td>
<td><tt>erronly=yes</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>xnumeric</td>
<td><tt>yes</tt> or <tt>no</td>
<td><tt>no</td>
<td>If <tt>yes</tt>, signifies that X values are numeric rather than categories.</td>
<td><tt>xnumeric=yes</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>vals</td>
<td><tt>yes</tt> or <tt>no</td>
<td><tt>no</td>
<td>If <tt>yes</tt>, display numeric values near the top of each bar.</td>
<td><tt>vals=yes</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>crossover</td>
<td>Y value</td>
<td> </td>
<td>A value in Y where bars begin
to point downward instead of upward. For instance, <tt>crossover=0</tt>
is often useful when dealing with financial income, to show loss
using downward bars.</td>
<td><tt>crossover=0</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>curve <br><br><b>order</td>
<td><tt>yes</tt><br>or<br><a href="linedetails.html">linedetails</a></td>
<td> </td>
<td>Generate a moving average curve fit to the bars. It will be drawn behind
the bars. Not applicable to a second set of bars.
<b>order</b> is an attitional parameter may be set to the number of preceding
data points to be considered when computing averages (default = 5).
</td>
<td><tt>curve=yes<br><br>"curve= color=blue"</td>
</tr>
<tr bgcolor=FFFFFF>
<td><b>sep</td>
<td><a href="atypes.html#punits">inches or cm</a></td>
<td>0.15 "</td>
<td>Controls bar separation when two bar sets are being rendered.</td>
<td><tt>sep=0.08</td>
</tr>
</table>
<br>
<br>
</td></tr>
<td align=right>
<a href="../doc/welcome.html">
<img src="../doc/ploticus.gif" border=0></a><br><small>data display engine <br>
<a href="../doc/Copyright.html">Copyright Steve Grubb</a>
<br>
<br>
<center>
<img src="../gallery/all.gif">
</center>
</td></tr>
</table>
<br>
<center>
<table><tr><td>
Ploticus is hosted at http://ploticus.sourceforge.net</td><td> </td><td>
<a href="http://sourceforge.net/projects/ploticus"><img src="http://sflogo.sourceforge.net/sflogo.php?group_id=38453&type=12"
width="120" height="30" border="0"
alt="Get ploticus data display engine at SourceForge.net. Fast, secure and Free Open Source software downloads" /></a>
</td></tr></table>
</center>
<p><hr>
Markup created by <em>unroff</em> 1.0, <tt> </tt> <tt> </tt>March 11, 2009.
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