Hello, I'd like to offer a heatmap plotting tool. Similar to the XY-Plotting tool (and even uses the same R_wrapper.sh script), but generates a heatmap with user customizable colors. To run this tool (assuming XY-Plotting tool already works), you'll need to install the "gplots" package, as explained here: http://enotacoes.wordpress.com/2007/11/16/easy-guide-to-drawing-heat-maps-to... Comments are welcomed, Gordon.