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Dave, Thanks for the response. That was the odd thing! The old version did somehow do tooltips and it was quicker?!? (I think is is the ver, I copied this from JFreeChart.java " * $Id: JFreeChart.java,v 1.18 2002/10/18 14:37:03 mungady Exp $") I would investigate further but now I have a workaround ...

I forgot to say, this gives at least a 10 fold decrease in memory used, according to my debug outputs.

Thanks for the post. There are some good ideas. I have one case with ioGAS where we plot 5 or 10 million points on the screen, AND I DON'T NEED TOOLTIPS. It used to work with a two year old version of JFreeChart, but not now (out of mem ex)! There is something fishy about the entity collection code ...

ok I am trying again to get a sourceforge password, so I can submit the changes properly.

I'll post when I get a password back from sourceforge... All I have done is::: Added: TukeyBoxAndWhiskerRenderer (this is the new bit) Changes: * BoxAndWhiskerCalculator.java Have changed tukey constants from 1.5 / 2 to 1.5 /3 Have made this class calc absolute min and max also. * BoxAndWhiskerItem....

I work on ioGAS which uses JFreeChart a lot. We needed a Tukey plot, to identify outliers in Geochem data. Rather than starting from scratch it was easier to use the JFree framework. Essentially I have written a new renderer to replace the existing one. See header below. If this is useful I can send...