public void Test_Heatmap_AutoScaling()
{
// https://github.com/ScottPlot/ScottPlot/issues/1485
double[,] intensities = new double[100, 100];
for (int i = 0; i < 100; i++)
{
for (int j = 0; j < 100; j++)
{
intensities[i, j] = (Math.Sin(i * .2) + Math.Cos(j * .2)) * 100;
}
}
var plt = new ScottPlot.Plot(500, 400);
var hmap = plt.AddHeatmap(intensities, ScottPlot.Drawing.Colormap.Viridis, lockScales: false);
hmap.Interpolation = InterpolationMode.Bicubic;
var cbar = plt.AddColorbar(hmap);
double[] tickPositions = ScottPlot.DataGen.Range(-150, 150, 50, true);
string[] tickLabels = tickPositions.Select(x => x.ToString()).ToArray();
cbar.SetTicks(tickPositions, tickLabels, -200, 200);
plt.Margins(0, 0);
TestTools.SaveFig(plt);
}
public void Test_Colorbar_CanBeAdded()
{
var plt = new ScottPlot.Plot();
var bmp1 = TestTools.GetLowQualityBitmap(plt);
plt.AddColorbar();
var bmp2 = TestTools.GetLowQualityBitmap(plt);
//TestTools.SaveFig(plt);
var before = new MeanPixel(bmp1);
var after = new MeanPixel(bmp2);
Assert.That(after.IsDarkerThan(before));
}
public void Test_Colorbar_ColorCanBeChanged()
{
var plt = new ScottPlot.Plot();
var cb = plt.AddColorbar(ScottPlot.Drawing.Colormap.Grayscale);
var bmp1 = TestTools.GetLowQualityBitmap(plt);
cb.UpdateColormap(ScottPlot.Drawing.Colormap.Blues);
var bmp2 = TestTools.GetLowQualityBitmap(plt);
//TestTools.SaveFig(plt);
var before = new MeanPixel(bmp1);
var after = new MeanPixel(bmp2);
Assert.That(before.IsGray());
Assert.That(after.IsNotGray());
Assert.That(after.IsMoreBlueThan(before));
}
public void Test_Colormap_LayoutCanBeReset()
{
var plt = new ScottPlot.Plot(400, 300);
plt.Style(figureBackground: System.Drawing.ColorTranslator.FromHtml("#dadada"));
var bmpOriginal = new MeanPixel(plt.GetBitmap());
var cb = plt.AddColorbar();
var bmpWithColorbar = new MeanPixel(plt.GetBitmap());
plt.Remove(cb);
plt.YAxis2.ResetLayout();
var bmpWithColorbarRemoved = new MeanPixel(plt.GetBitmap());
Assert.AreNotEqual(bmpOriginal, bmpWithColorbar);
Assert.AreEqual(bmpOriginal, bmpWithColorbarRemoved);
}
public void Test_Heatmap_ManualScaling()
{
// The goal is to span the whole colormap only over values 0-200
// even though the original data has many values outside this range.
// https://github.com/ScottPlot/ScottPlot/issues/1485
double[,] intensities = new double[100, 100];
for (int i = 0; i < 100; i++)
{
for (int j = 0; j < 100; j++)
{
intensities[i, j] = (Math.Sin(i * .2) + Math.Cos(j * .2)) * 100;
}
}
var plt = new ScottPlot.Plot(500, 400);
var cmap = ScottPlot.Drawing.Colormap.Viridis;
var hmap = plt.AddHeatmap(intensities, cmap, lockScales: false);
hmap.Interpolation = InterpolationMode.Bicubic;
hmap.ScaleMin = 0;
hmap.Update(intensities, cmap, min: 0, max: 200); // intentionally cut-off data
Console.WriteLine(hmap.ScaleMin);
double[] tickPositions = ScottPlot.DataGen.Range(0, 200, 25, true);
string[] tickLabels = tickPositions.Select(x => x.ToString()).ToArray();
var cbar = plt.AddColorbar(hmap);
cbar.SetTicks(tickPositions, tickLabels, 0, 200);
plt.Margins(0, 0);
TestTools.SaveFig(plt);
}
