I am not entirely sure about that, but as far as I can tell you, Chart::Graph::Gnuplot can not do intelligent labelling of data ponts. At least, I have never been able to make it do this. The problem seems to be that neither gnuplot calculates the labels for you and Chart::Graph::Gnuplot does not contain additional logic to do that.

So, if you want labelling, you should definitely look into some other charting libraries on CPAN...

rg0now