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<A HREF="toc.html">Contents</A>
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<H3><A NAME="7_2_5">7.2.5 Using grouped bar plots</A></H3>
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<P> These types of bar graph is used to easy group two or more bars
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together around each tick (X-value). The bars will be placed
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immediately beside each other and as a group centered on each tick
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mark. A grouped bar is created by aggregating two or more ordinary bar
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graphs and creating a <A href="../ref/GroupBarPlot.html#_C_GROUPBARPLOT">
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GroupBarPlot()</A> From two ordinary bar graphs along the lines of<DIV class="phpscript">
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<CODE><FONT color="#000000"> <FONT color="#0000BB"> </FONT><FONT color="#FF8000">
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// Create the bar plots
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<BR></FONT><FONT color="#0000BB">$b1plot </FONT><FONT color="#007700">
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= new </FONT><FONT color="#0000BB">BarPlot</FONT><FONT color="#007700">(</FONT><FONT
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color="#0000BB">$data1y</FONT><FONT color="#007700">);
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<BR></FONT><FONT color="#0000BB">$b1plot</FONT><FONT color="#007700">-></FONT><FONT
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color="#0000BB">SetFillColor</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
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"orange"</FONT><FONT color="#007700">);
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<BR>
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<BR></FONT><FONT color="#0000BB">$b2plot </FONT><FONT color="#007700">
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= new </FONT><FONT color="#0000BB">BarPlot</FONT><FONT color="#007700">(</FONT><FONT
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color="#0000BB">$data2y</FONT><FONT color="#007700">);
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<BR></FONT><FONT color="#0000BB">$b2plot</FONT><FONT color="#007700">-></FONT><FONT
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color="#0000BB">SetFillColor</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
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"blue"</FONT><FONT color="#007700">);
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<BR>
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<BR></FONT><FONT color="#FF8000">// Create the grouped bar plot
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<BR></FONT><FONT color="#0000BB">$gbplot </FONT><FONT color="#007700">
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= new </FONT><FONT color="#0000BB">GroupBarPlot</FONT><FONT color="#007700">
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(array(</FONT><FONT color="#0000BB">$b1plot</FONT><FONT color="#007700">
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,</FONT><FONT color="#0000BB">$b2plot</FONT><FONT color="#007700">));
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<BR>
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<BR></FONT><FONT color="#FF8000">// ...and add it to the graPH
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<BR></FONT><FONT color="#0000BB">$graph</FONT><FONT color="#007700">-></FONT><FONT
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color="#0000BB">Add</FONT><FONT color="#007700">(</FONT><FONT color="#0000BB">
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$gbplot</FONT><FONT color="#007700">);</FONT><FONT color="#0000BB"></FONT>
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</FONT></CODE></DIV></P>
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<P> The following example illustrates this type of graph<DIV class="example">
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<BR> <A href="exframes/frame_example21.html" target="blank"><IMG border="0"
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HEIGHT="200" src="img/img/img/img/img/img/example21.png" WIDTH="310"></A>
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<BR><B>Figure 40:</B> A grouped bar plot <A href="exframes/frame_example21.html"
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target="blank">[src]</A>
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<P></P>
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</DIV></P>
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<P> There is no limit on the number of plots you may group together.</P>
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<P> If you use the SetWidth() method on the GroupBarPlot() this will
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affect the total width used by all the added plots. Each individual bar
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width will be the same for all added bars. The default width for
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grouped bar is 70%.</P>
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<P> Setting the grouped with to 0.9 would result in the image below.<DIV class="example">
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<BR> <A href="exframes/frame_example22.html" target="blank"><IMG border="0"
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HEIGHT="200" src="img/img/img/img/img/img/example22.png" WIDTH="310"></A>
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<BR><B>Figure 41:</B> Adjusting the width for a gropued bar plot. <A href="exframes/frame_example22.html"
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target="blank">[src]</A>
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<P></P>
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<P></P>
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