CNiGraph with large data

Hi everyone,
I have this issue:
Language: C++ (MFC) on Visual Studio.Net 2003 environment
         and Measurement Studio 8.0.1 (trial version)
I intend to switch from LabWindows/CVI to Measurement Studio
Please help me with 2 following questions:
Question 1:
   I have this piece of codes:
   CNiGraph m_Graph;
   for (i = 1; i <= 5000; i++)
      m_Graph.Plots.Add();
   for (i = 1; i <= 5000; i++)
      CNiInt32Vector vectorY(900);
      ...//prepare data for vectorY
      m_Graph.Plots.Item(i).ChartY(vectorY);
   and the program crashes for having too many data.
   However, in LabWindows/CVI, this piece of codes work fine:
   for (i = 1; i <= 5000; i++)
      //PlotXY: built-in function of LabWindows/CVI
      graph_handle = PlotXY (panelHandle, controlID, *xArray, *yArray
                             , 900 /*number of points*/,...)
      ListHandle.Add(graph_handle)
   So how can I make it works in Measurement Studio?
Question 2: How can I undo the zoom of a CNiGraph?
Regards,

Hi Nhan123,
I setup a simple test on my machine to graph the same amount of data using VC++ MFC in Visual Studio 2003 with Measurement Studio and I was unable to reproduce this error. I did not plot 5000 sets of 900 points however, as this would have taken a very very long time on my machine. I was able to plot about 2000 sets of 900 points without any errors. What was the exact error message that you are receiving when plotting this amount of data in Measurement Studio?
As for your second question, if have outlined a simple method to zoom back out to the default levels programmatically. I found this information in the Measurement Studio help by searching for CNiGraph. The results returned a help topic titled "Using the Measurement Studio Graph Visual C++ Control". In this help topic, there is a sub-topic titled "Panning and Zooming in the Measurement Studio Graph Visual C++ Control", which included the following example code that will reset the pan / zoom of a CNiGraph.
m_graph.Axes.Item(1).SetMinMax(0, 10);
m_graph.Axes.Item(2).SetMinMax(0, 10);
Thanks,
Jonathan C
Staff Application Engineering Specialist | CTD | CLA
National Instruments

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http://sdrv.ms/1fYC9qE
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[LV2009]
[Cross-posted to LAVA]
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Unable to display content. Adobe Flash is required.
Certified LabVIEW Architect * LabVIEW Champion
Attachments:
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Note: Your reference number is included in the Subject field of this
message. It is very important that you do not remove or modify this
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Hi,
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        oEditText.DataBind.SetBound(True, "@UDO_TEST", "DocEntry")
        oMatrix.Columns.Item("oClmn0").DataBind.SetBound(True, "@UDO_TEST1", "U_CARDCODE")
        oForm.DataBrowser.BrowseBy = "3"

Just in case any one needs a Observable Collection that deals with large data sets, and supports FULL EDITING...

the VirtualizingObservableCollection does the following:
Implements the same interfaces and methods as ObservableCollection<T> so you can use it anywhere you’d use an ObservableCollection<T> – no need to change any of your existing controls.
Supports true multi-user read/write without resets (maximizing performance for large-scale concurrency scenarios).
Manages memory on its own so it never runs out of memory, no matter how large the data set is (especially important for mobile devices).
Natively works asynchronously – great for slow network connections and occasionally-connected models.
Works great out of the box, but is flexible and extendable enough to customize for your needs.
Has a data access performance curve so good it’s just as fast as the regular ObservableCollection – the cost of using it is negligible.
Works in any .NET project because it’s implemented in a Portable Code Library (PCL).
The latest package can be found on nugget. Install-Package VirtualizingObservableCollection. The source is on github.

Good job, thank you for sharing
Best Regards,
Please remember to mark the replies as answers if they help

CNiGraph with large data

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