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copied!<p>I've played with Processing and OpenGL <a href="http://doc.gold.ac.uk/~ma802gp/abstract" rel="nofollow noreferrer">last term</a>. Not sure if drawing 2D planes is the best approach. But you can make certainly draw your graph points in 3d using Processing if you want to. Here is an applet from <a href="http://www.openprocessing.org/visuals/?visualID=7098" rel="nofollow noreferrer">openprocessing</a>.</p> <p>We studied signal processing a bit and we used <a href="http://www.network-theory.co.uk/docs/octave3/octave%5F159.html" rel="nofollow noreferrer">Octave</a> and <a href="http://www.gnuplot.info/" rel="nofollow noreferrer">GNUPlot</a> to plot signals in 2d(using plot, stem, etc.) and 3d(using mesh)</p> <p><a href="http://www.network-theory.co.uk/docs/octave3/mesh.png" rel="nofollow noreferrer">octave mesh http://www.network-theory.co.uk/docs/octave3/mesh.png</a></p> <p>I've googled for java gnuplot and seemed to found some handy links...</p> <p>Check out the Java links on <a href="http://www.gnuplot.info/links.html" rel="nofollow noreferrer">GnuPlot Programming Interfaces</a>, like: <a href="http://www.is.informatik.uni-duisburg.de/projects/java-unidu/api/de/unidu/is/gnuplot/package-summary.html" rel="nofollow noreferrer">this</a>,<a href="http://gnujavaplot.sourceforge.net/JavaPlot/About.html" rel="nofollow noreferrer">javaplot</a>, <a href="http://jgnuplot.sourceforge.net/" rel="nofollow noreferrer">jgnuplot</a>, etc.</p> <p>For some hardcore graphin' be it 2d or 3d, gnuplot seems to be a pretty powerful choice.</p>

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