How to create and build ContourSeries using Oxyplot?

Question

I have a WPF application where I need to visualize y = y (x1, x2), where x1, x2 are linear coordinates. I can do this using HeatMapSeries in Oxyplot, but when I want to build two datasets in one window, heatmaps are not a suitable tool. A few contour rows would be better. Now I tried to achieve this in the same way as with HeatMapSeries, which worked very well:

public void PlotHeatMap (){ OxyPlot.PlotModel model = new PlotModel { Title = "2-D data" }; model.Axes.Add( new OxyPlot.Axes.LinearColorAxis { Position = OxyPlot.Axes.AxisPosition.Right, Palette = OxyPalettes.Jet( 500 ), HighColor = OxyColors.Gray, LowColor = OxyColors.Black } ); OxyPlot.Series.HeatMapSeries heatmap = new OxyPlot.Series.HeatMapSeries { Data = ( Double[ , ] )data, X0 = x1min, X1 = x1max, Y0 = x2min, Y1 = x2max }; model.Series.Add( heatmap ); } 

Now, when I try to use ContourSeries instead, I just replace HeatMapSeries with ContourSeries:

 public void PlotContour (){ OxyPlot.PlotModel model = new PlotModel { Title = "2-D data" }; model.Axes.Add( new OxyPlot.Axes.LinearColorAxis { Position = OxyPlot.Axes.AxisPosition.Right, Palette = OxyPalettes.Jet( 500 ), HighColor = OxyColors.Gray, LowColor = OxyColors.Black } ); OxyPlot.Series.ContourSeries contour = new OxyPlot.Series.ContourSeries { ColumnCoordinates = arrayFromMinToMax1, RowCoordinates = arrayFromMinToMax2, ContourLevels = arrayOfLevels, ContourColors = arrayOfColors, // Same # elements as the levels' array Data = ( Double[ , ] )data }; model.Series.Add( contour ); } 

This simply outputs the result:

The x and y axes are and correspond to the min and max coordinates, but I do not see contour lines. I suspect that something is missing when setting up the axis (if it is the same as for HeatMapSeries?). I do not know how to continue this contour plot. Are there examples other than, for example, ContourSeriesExamples examples on GitHub?

Thanks for any help!

Answer 1

I finally found what happened, it was my mistake! ColumnCoordinates and RowCoordinates must match the size of DoubleArray Data ! And I was not sure what they were. Now the contour and heatmap are aligned! Thanks to Anders for their support and pushing me to my own code!