<article xmlns:r="http://www.r-project.org">
One needs the functions from \file{mathmlPlot} in \dir{examples}.
<r:code>
 inFile = system.file("data/mathmlQuadratic.xml","XML")
 d = xmlTreeParse(inFile)
 plot(1:10, type="n")
 text(5,5, mathmlPlot(d))
</r:code>

<r:code><![CDATA[
 u = xmlTreeParse("data/mathmlRoot.xml")
 text(5,7,mathmlPlot(u))
]]></r:code>

<r:code>
 u = xmlTreeParse("data/mathmlSet.xml")
 text(5,9,mathmlPlot(u))
</r:code>
</article>
