HOWTO: How can I plot charts with an unequal number of points per series?

Q6001007. How can I plot charts with an unequal number of points per series?

The information on this article applies to

Chart FX for .NET Web Forms
Chart FX for .NET Windows Form

Summary
This article will explain how to create a chart when one series is longer than the other, or there is missing data in the middle.

Description
If you are binding data from a DataSet (or directly from the table) ChartFX sets the AllocHidden flag by default, which will set any missing data to the Chart.Hidden enumeration. But, if you are using the API to pass data by assigning the Value and XValue properties you will need to set the AllocHidden flag manually when you open the data communication channel, as follows:

With Chart1
            .OpenData(COD.Values Or COD.AllocHidden, 2, 5)
            .OpenData(COD.XValues Or COD.AllocHidden, 2, 5)

            'the first series is missing some data in the middle
            .XValue(0, 0) = 0.86
            .Value(0, 0) = 0.41
            .XValue(0, 1) = 0.77
            .Value(0, 1) = 0.24
            
            .XValue(0, 3) = 0.55
            .Value(0, 3) = 0.16
            .XValue(0, 4) = 0.49
            .Value(0, 4) = 0.08

            'the second series only has 3 points
            .XValue(1, 0) = 0.12
            .Value(1, 0) = 0.08
            .XValue(1, 1) = 0.23
            .Value(1, 1) = 0.05
            .XValue(1, 2) = 0.34
            .Value(1, 2) = 0.02
           

            .CloseData(SoftwareFX.ChartFX.COD.XValues)
            .CloseData(SoftwareFX.ChartFX.COD.Values)
        End With

ArticleID:Q6001007
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Reviewed:7/11/2002 10:38:00 AM

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