Hi Experts,
I want to display grid based measurement data (X: 1,2,3.. Z:1,2,3) but with empty data points and no interpolation at all between data points.
So far I found a way to do it with NTriangulatedSurfaceSeries - here is a rough example with just 4 data points - where one data point is empty:


Unfortunatly, I could not find a way to handle empty data points.
The upper left square should be completly empty since all corner values are NaN - but it isnt.

Is there a way to achieve this?
Or is there even an easier and better way than using Triangulated surface chart ? Basically I have transformed each measured data point to 4 points representing the points very close to the corner of the measured data point within the measurement grid - for example measurement point represented by the upper right yellowish square (X=2, Z=2 with value 3.1) is transformed to:

surface.XValues.AddRange( new double[] {1.51, 1.51, 2,49, 2.49} );
surface.ZValues.AddRange( new double[] {1.51, 2.49, 1.51, 2.49});
surface.Values.AddRange( new double[] {3.1, 3.1, 3.1 , 3.1});

This approach works (except for empty data points which are double.NaN) - but looks clumsy somehow ...

Thanks a lot for your help,
Joern

Hi Joern,

The grid surface also regards empty data points - check the following example:

NCartesianChart chart = (NCartesianChart)nChartControl1.Charts[0];

chart.Enable3D = true;

chart.Width = chart.Height = chart.Depth = 40;

chart.Projection.SetPredefinedProjection(Nevron.GraphicsCore.PredefinedProjection.OrthogonalTop);

NGridSurfaceSeries gridSurface = new NGridSurfaceSeries();

gridSurface.Data.SetGridSize(3, 3);

for (int i = 0; i < gridSurface.Data.GridSizeX; i++)

{

for (int j = 0; j < gridSurface.Data.GridSizeZ; j++)

{

gridSurface.Data.SetValue(i, j, i * j);

}

}

gridSurface.Data.SetValue(0, 2, double.NaN);

chart.Series.Add(gridSurface);

nChartControl1.Controller.Tools.Add(new NPanelSelectorTool());

nChartControl1.Controller.Tools.Add(new NTrackballTool());

Hope this helps - let us now if you meet any problems...

Best Regards,
Nevron Support Team

Thanks a lot for the reply - unfortunatly I still cant get it working the way I want. I already tried NGridSurfaceSeries in the first place since it can work with NaN-values.
But there are 2 major drawbacks:
1. There is always interpolation between adjacent squares of the grid - but I want to color each single square of the underlying grid with just one color
2. When I run the example, it is all colored in the same color when viewd from the top:



Basically, I am looking for a way to make the example look like:



Is there a way to do so?

Thanks again,
Joern

Hi Joern,

We're going to have a heat map series in the upcoming new version that will solve this problem. How urgent is this for your project?

Best Regards,
Nevron Support Team

... unfortunatly it is rather urgent - it is scheduled to be working at the end of this month.

Best regards,
Joern