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Guess not

Is it possible to specify the shape of each data point on an XP type plot. I have some data where certain values may be erroneous so I want the user to see a different shape or color. For example, if the data is questionable draw a red square instead of a blue circle at the point.
Many thanks,
Stever

Hi, no doubt I will slap my forehead when I hear the answer, but I have been unable to find out how to do something very simple. I have created a statistical line chart with ChartFactory.createLineChart. The dataset is a DefaultStatisticalCategoryDataset. I need to update the data every minute or so...