how to plot mulitple graph in scattergraph control and possible bug in PlotXYMultiple?

[Shazaduh]

Hi,

I have two double arrays declared and I like to plot x and y and x and x. I can do one at a time, how can I append it so that both x,y and x,x points are displayed. I tried using the plotXYmulitple command, but it requires 2D array. Do I have to convert  my data into 2D array or there is an easier option? any help would be greatly appreciated.

[Anna_K.]

Hello, Yes you will have to pass it a 2D array so your will need to create that out of your 1D array

[Shazaduh]

Thanks Anna.

I tried that and here is the problem:

There is mismatch between PlotXYMultiple function in documentation and actual implementation. see below for the picture. You think it might be a possible bug? it seem xData and yData is swaped.

public void PlotXYMultiple(
	double[] xData,
	double[,] yData
}

[Anna_K.]

That looks like a bug to me. I have submitted this to our developpers to repair. Thank you for briniging this to our attention.

[Anna_K.]

Hello, my apologies, upon closer inspection I see that you are using PlotYXMultiple to demonstrate the tip strip but quoting PlotXYMultiple in the Help. Problem solved!

[Shazaduh · Accepted solution]

You are absolutely right! thats what happen you are coding two in the morning. I am posting my own solution below in case anyone else interested. But you know it will be nice if you can do mulitple ploting like matlab function plot(x,y,x,y) etc.

Thanks again!

Kashif

            double[] xValues = new double[5] { 1, 2, 3, 4, 5 };
            double[] y1Values = new double[5] { 1, 2, 3, 4, 5 };
            double[] y2Values = new double[5] { 1, 4, 9, 16, 25 };

          
            
            scatterGraph1.DefaultDataOrientation = DataOrientation.DataInColumns;

            double[,] yValues = new double[xValues.Length, 2];

            for (int i = 0; i < xValues.Length; i++)
            {
                yValues[i, 0] = y1Values[i];
                yValues[i, 1] = y2Values[i];
            }

            scatterGraph1.PlotXYMultiple(xValues,yValues);

[Gary Zhang]

I would like to plot two sets of data points (X1, Y1) & (X2, Y2) on the scatter graph as soon as I receive them, psuedo real time plot.  Below is the data I'm trying to plot.  However the data doesn't look right.  What do I need to do, so my two points are appended to their last points? 

do  

' read data to get Data1 & Data2

x1 = runLength.TotalMinutes

x2 = runLength.TotalMinutes

y1 = Data1(index)

y2 = Data2(index) 

frmInfo.ScatterGraph1.PlotXYAppend(xVal, yVal)

 loop while (flag)

[Gary Zhang]

correction in my last code

do  

' read data to get Data1 & Data2

x(0) = runLength.TotalMinutes

x(1) = runLength.TotalMinutes

y(0) = Data1(index)

y(1) = Data2(index) 

 frmInfo.ScatterGraph1.PlotXYAppend(x, y)

 loop while (flag)

[Jensen W]

Could you please be just a little more specific on what you mean by

"so my two points are appended to their last points"

What exactly should be appended to what?  Or what do you expect the plot to look like?

[Gary Zhang]

What I'm looking for is a way to have two streams of data.  One would be plotted on the primary Y axis, and the other would be plotted on the secondary Y axis.  The data would be plotted onto the graph when it's received (so appending it to the graph).  Attached is an example of what I'm looking for. (done in excel)