jFreeChart: Possbile to combine StatisticalBarRenderer and LayeredBarRenderer? -

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i want create chart consists of couples of 2 bars. 1 of them regular bar, second 1 layered , has deviation. (photoshopped): alt text http://dl.dropbox.com/u/1144075/bildschirmfoto%202010-07-23%20um%2011.57.59.png

this snippet of code:

private static jfreechart createstatisticalbarchart(defaultstatisticalcategorydataset dataset, string charttitle, string domainaxislabel, string rangeaxislabel, list<string> sunndaymap) {      categoryaxis xaxis = new categoryaxis(domainaxislabel);     valueaxis yaxis = new numberaxis(rangeaxislabel);     categoryitemrenderer renderer = new statisticalbarrenderer();      categoryplot plot = new categoryplot(dataset, xaxis, yaxis, renderer);       jfreechart chart = new jfreechart(charttitle,             new font("arial", font.plain, 10),             plot,             true);

my dataset has mean+standarddeviatin records every second record's deviation being "0", no range indicators displayed.

anyone idea how can accomplish that?

you can use small negative value in setitemmargin() achieve overlap, example

renderer.setitemmargin(-0.10f);

it appears standard deviation lines not drawn if getstddevvalue() method returns null. might try value instead of "0".


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