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HI there, I have released some of my code which has been developed since as early as 1998. It is available here : http://www.flatmax.org/gtkiostream/ The reason why I am writing to the list is that it has a very simplistic approach for using GtkDatabox. It uses the same approach as Octave (www.octave.org) - it makes it very easy to construct plots. For example like so : #include <Plot.H> vector <gfloat> x; // ordinate data vector <gfloat> y; // co-ordinate data Plot figure; // create a plotting figure figure.semilogx(&x[0],&y[0], x.size()); // plot x and y data you can use 'plot' instead of semilogx figure.hold(true); // hold the data figure.semilogx(&xx[0],&yy[0]); // plot xx and yy data on the same plot. figure.grid(true); figure.hold(false); // next plot will clear - or you can use plot.clf(); Matt |