RealTime

[User (Legacy)]

How can I increase speed for RealTime Graph

1. With RealTime examples give on web site, I increase the Timer to 0.01 sec

So I'm supposed to have 100 data per sec.

The graphic did not follow at this speed

How can I go faster (maybe 100- 250 hz for 1 series, 50 hz for 2 series, ..)

2. I try, (for my application needs) to store the data into a dataSet and

link the data set to the graph, but I'm not sure it's the right procedure

(It could be interesting for real-time ...)

ex.

'initialization

Chart1.DataSource = mDS_Data.Tables("AcqData")

'data receiving

Private Sub OnData(ByVal DBL_Data As Double) Handles

Instrument.OnDataReceiving

    Dim DR_curRow As DataRow

   DR_curRow = mDS_Data.Tables("AcqData").NewRow()

   DR_curRow("Time") = mDBL_Rate * mDS_Data.Tables("AcqData").Rows.Count

   If isNothing (DBL_Data)  Then

      DR_curRow("Data") = DBNull.Value

   Else

      DR_curRow("Data") = DBL_Data

   End If

    mDS_Data.Tables("AcqData").Rows.Add(DR_curRow)

    Chart1.DataSource = Nothing

    Chart1.DataSource = Me.mDS_Data.Tables(0)

    Chart1.Refresh()

End Sub

Thanks

Phil G

pgagnon@fiso.com

IT Manager

FISO Technologies

www.fiso.com

[Software FX]

Taking out anti-aliasing:

Chart1.SmoothFlags = SmoothFlags.None;

Improves the drawing speed dramatically.

The type of chart will also affect the rendering speed, the more stuff you

have the slower it will be, for example, rendering a line chart with

Circular point markers is slower than rendering a chart with Square point

markers or no markers at all.

-- 

FP

Software FX, Inc.