"There is pretty much no decent scripting language available on Windows, so if you do not have immediate access to some unix (or at least cygwin), you're out of luck."<p>He seems to be fully uniformed about what he writes about. The graphs he produced in Excel can be produced without Excel and just with open-source tools on practically any platform. Python and Gnuplot can be installed anywhere:<p><a href="http://www.python.org/" rel="nofollow">http://www.python.org/</a><p>"Python runs on Windows, Linux/Unix, Mac OS X, and has been ported to the Java and .NET virtual machines."<p><a href="http://www.gnuplot.info/" rel="nofollow">http://www.gnuplot.info/</a><p>"Gnuplot is a portable command-line driven graphing utility for Linux, OS/2, MS Windows, OSX, VMS, and many other platforms."