On Jun 14, 2016, at 9:49 PM, Joseph F Harrison <[log in to unmask]> wrote:
> Option A) Version based on TimeTableXYDataset.
This is the wrong dataset. Don't use it.
> Option B) Version that uses a DefaultTableXYDataset to store the data.
You might also try CategoryTableXYDataset or XYSeriesCollection. Anyway...
> Here's what happens: DefaultTableXYDataset listens to the change event for all the XYSeries you add to it. Whenever you add a value to any series with a previously unseen x-value (e.g. x=1), it adds a dummy entry to all the other series. Then, when you try to add a value (at x=1) to another series, it sees the dummy value already there (at x=1) and throws a SeriesException: X-value already exists.
Are you using add() or are you using addOrUpdate()? The latter would probably work, no?