note martin Are you sure you want to get a histogram with >60000 bars? Even with one-pixel wide bars this would fill a very big space. You might be able to do that with [href://http://www.gnuplot.info/|Gnuplot]. CPAN has an interface to it: [cpan://Chart::Gnuplot]. See also [isbn://0380756668]. <p> If what you really want to get is a histogram with a much smaller number of bars, you'd have to insert some sort of aggregation. You could add the values of 1000 adjacent keys (numerically sorted) into a new bucket each, say, and plot the accumulated values. 862314 862314