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<title>ploticus: vbars prefab</title>
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<td><br><h2>vbars prefab</h2></td>
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<a href="../doc/Welcome.html"><img src="../doc/ploticus.gif" border=0></a><br>
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<a href="../doc/Welcome.html">Welcome</a>
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<a href="../gallery/index.html">Gallery</a>
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<a href="../doc/Contents.html">Handbook</a>
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.TH vbars_prefab PL "08-JAN-2002 PL ploticus.sourceforge.net"
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<center><table cellpadding=2><tr>
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<td><img src="../gallery/prefab_img/vbars1.gif"></td></tr>
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pl -prefab vbars data=data4 delim=tab x=1 y=2 vals=yes\\
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yrange=0 yinc=20 ygrid=yes barwidth=0.3
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<center><table cellpadding=2><tr>
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<td><img src="../gallery/prefab_img/vbars2.gif"></td></tr>
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pl -prefab vbars data=data5 delim=tab x=1 y=2 err=3 \\
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y2=4 err2=5 errunder=yes ygrid=yes barwidth=0.1 \\
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name=Treatment name2=Control stubvert=yes
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<center><table cellpadding=2><tr>
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<td><img src="../gallery/prefab_img/vbars3.gif"></td></tr>
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pl -prefab vbars data=data5 delim=tab x=1 y=2 err=3 y2=4 \\
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err2=5 erronly=yes name=Treatment name2=Control stubvert=yes \\
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errcolor=red errcolor2=blue sep=0.08 xgrid=yes ylog=log
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<center><table cellpadding=2><tr>
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<td><img src="../gallery/prefab_img/vbars4.gif"></td></tr>
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pl -prefab vbars data=data18 x=1 y=2 crossover=0 \\
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<a href="prefabs.html#examples">
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\0How to run these examples
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<a href="prefabs.html">
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for producing bar graphs with vertical solid bars for one or two groups.
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Two groups of values may be displayed if \fBy2\fR (etc) are used, as in the second example.
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Error bars may be added above or below the bar graph, or error bars alone may be rendered.
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By default the X axis is categories, but it may be continuous numeric if \fBxnumeric\fR is used
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(for chronological data use the
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<a href="prefab_chron.html">
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This prefab is based on
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<a href="prefab_stdparms.html">
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\0Standard prefab parameters
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are all supported. \fBdata\fR, \fBx\fR and \fBy\fR are required.
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\fBy\fR values should be numeric and will determine the height of bars.
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\fBx\fR values determine bar locations.
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<a href="color.html">
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of the first set of filled bars (default = orange)
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\fBbarwidth\fR is the width of the filled bars. This is a value in inches,
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or may be given as \fCline\fR for very thin bars.
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\fBerrcolor\fR is the error bar
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<a href="color.html">
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for the error bars associated with the first set of bars
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\fBerrwidth\fR is the width of error bar tails in inches (default = 0.08)
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\fBerrthick\fR is the thickness of the error bar lines (default = 0.5)
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\fBerrunder\fR may be set to \fCyes\fR if error bars should be drawn "under"
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the filled bars (only the upward error bar is thus visible).
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\fBerronly\fR may be set to \fCyes\fR if error bars only are desired,
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without any filled bars.
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\fBxnumeric\fR may be specified as \fCyes\fR to signify that X values
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are numeric and not categories.
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\fBvals\fR may be specified as \fCyes\fR to indicate that the
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numeric values should be displayed near the top of each bar.
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\fBcrossover\fR may be specified as the value in Y where bars begin
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to point downward instead of upward. For instance, \fCcrossover=0\fR
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is often useful when dealing with financial income, to show loss
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\fBcurve\fR may be given as \fCyes\fR, or as a
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<a href="linedetails.html">
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attribute, which causes a moving average curve to be fit to bars, and drawn behind
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the bars. Not applicable to a second set of bars.
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The \fBorder\fR parameter may be set to the number of preceding data points
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to be considered when computing averages (default = 5).
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The following parameters are used when displaying two groups of values.
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The second example above illustrates.
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\fBy2\fR, \fBcolor2\fR, \fBerr2\fR, and \fBerrcolor2\fR control the size and color
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of the second set of bars, and the magnitude and color of error bars
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associated with the second set. Default color2 is green.
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\fBsep\fR controls bar separation (default=0.15)
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\fBname\fR and \fBname2\fR should be given as legend labels for the two groups
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\fBlegend\fR controls the
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<a href="attributetypes.html#xy">
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of the legend. Example: \fC"legend=1 0.5"\fR Default is \fCmin+0.4 max\fR.
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<a href="Welcome.html">
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<img src="../doc/ploticus.gif" border=0></a><br><small>data display engine <br>
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<a href="../doc/Copyright.html">Copyright Steve Grubb</a>
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<img src="../gallery/all.gif">
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man/manpl/prefab_vbars
