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Your first choice is to either make a category or an XY chart. As a rule of thumb: select a category chart when you have groups of data on the domain axis and select an XY chart when your domain axis represents some continuous domain. For the category chart you can call ChartFactory.createLineChart(...

Yes.

Or, you can create a category chart. Do you have the manual? It will make your life a lot easier.

The following will make a more suitable default for the auto-width-method:

Indeed, you probably have an XYPlot.

Of course, x and y are not absolute, but very much exactly the domain and range values. Problem solved!

I am trying to add an XYPointerAnnotation to a combined line chart. The XYPointerAnnotation constructor requires an X and Y value which I think are absolute to the complete chart area.

How can I calculate the X and Y value from a given domain and range value?

Regards,
Erik.

In JFreeChart 1.0 RC you can use org.jfree.data.general.CombinedDataset. Perhaps that works in your version as well.

Hi, I am using Java 5 but I see the same performance problems for large PNG images. (JFreeChart is using ImageIO because ImageEncoderFactory.newInstance("png").toString() returns "org.jfree.chart.encoders.SunPNGEncoderAdapter@64dc11".) After reading the thread I am not exactly sure what to do. Shoul...