New Post: Heatmap with mesh offset problem

[Example("Diagonal matrix")]
public static PlotModel DiagonalMatrix()
{
   var data = new double[6, 6];
   data[0, 0] = 1;
   data[1, 1] = 1;
   data[2, 2] = 1;
   data[3, 3] = 1;
   data[4, 4] = 1;
   data[5, 5] = 1;

   var model = new PlotModel("Diagonal matrix");
   model.Axes.Add(new ColorAxis { Position = AxisPosition.Right, Palette = OxyPalettes.Jet(500), HighColor = OxyColors.Gray, LowColor = OxyColors.Black });

   // adding half cellwidth/cellheight to bounding box coordinates
   var hms = new HeatMapSeries { X0 = 0, X1 = 5, Y0 = 0, Y1 = 5, Data = data, Interpolate = true };
   model.Series.Add(hms);
   return model;
   }