> Hi all,
>
> I have a slight problem when using chartfx in vb.net.  I have a line
> graph that needs to be able to plot 10,000 points.  I believe that this
> isn't too unfeasible however whenever I begin plotting the points it
> slows down immensely.  If i Alt-Tab to another full screen application
> and then Alt-Tab back a few seconds later, the graph has redrawn a lot
> more of it that it would have had it been on the screen all the time.
>
> This leads me to believe that it is due to the graph refreshing every
> point whenever a new one is added.  At my calculations that would mean
> in total, the number of points actually plotted for a 10,000 point
> graph is around 42 million!  10000 + 9999 + 9998 + ... etc.
>
> Is there anyway around this so that the graph will only draw on the
> last point added?  The code snippet i am using is below:
>
> For i As Integer = 0 To 10000 - 1
>
>           chtChart.OpenData(SoftwareFX.ChartFX.COD.XValues Or
> SoftwareFX.ChartFX.COD.AllocHidden, SeriesCount, 10000)
>
>           chtChart.OpenData(SoftwareFX.ChartFX.COD.Values Or
> SoftwareFX.ChartFX.COD.AllocHidden, SeriesCount, 10000)
>
>           'plot the point
>           chtChart.Value(SeriesCount - 1, i) = y
>           chtChart.XValue(SeriesCount - 1, i) = x
>           chtChart.Series(SeriesCount - 1).Tag = sp.scan.sampleName
>
>           Dim str As String = ""
>           str = "x: " & x.ToString("N1") & vbCrLf
>           str += "y: " + y.ToString("N3")
>
>           chtChart.Point(SeriesCount - 1, i).Tag = str
>
>           'Close the chart control for data
>           chtChart.CloseData(SoftwareFX.ChartFX.COD.Values)
>           chtChart.CloseData(SoftwareFX.ChartFX.COD.XValues)
> Next