Marker for multiple categories in a BoxAndWhisker Plot

[davidweber]

hi all

i've implemented a BoxAndWhisker plot with a BoxAndWhiskerCategoryDataset in a CategoryPlot.

the plot has 22 categories. my problem is, that i want to mark multiple categories with the same color without a gap between the colorations of the single categories but with a category margin.

what i did:

i marked with the following method each category with a CategoryMarker.

private void addCategoryMarker(CategoryPlot plot, String categoryName, Color color, String markerLabel) {
// add a category marker
CategoryMarker marker = new categoryMarker(categoryName, color, new BasicStroke(1.0f));
marker.setDrawAsLine(false);
marker.setLabel(markerLabel);
marker.setLabelFont(new Font("Dialog", Font.PLAIN, 11));
marker.setLabelTextAnchor(TextAnchor.TOP_LEFT);
marker.setLabelOffset(new RectangleInsets(2, 5, 2, 5));
plot.addDomainMarker(marker, Layer.BACKGROUND);
}


if i set the category margin of the x-axis to 0, there are no gaps between the categories and the coloration is as i want it to be [xAxis.setCategoryMargin(0.0);].

but, i don't want to have no gaps between the categories, i just want to have no gaps between the coloration.

i also tried out an IntervalMarker, but this marker is only suitable for the RangeAxis and not for the DomainAxis.

does anybody know the right way to do it?

regards david

[Jyothy]

If you want only lines to categorize the chart you can use XYLineAnnotation

to draw lines on graph