public void Test_PlotPolygon_SimulateShadedCurve()
{
// generate sample data
Random rand = new Random(0);
var dataY = ScottPlot.DataGen.RandomWalk(rand, 1000, offset: -10);
var dataX = ScottPlot.DataGen.Consecutive(dataY.Length, spacing: 0.025);
// create an array with an extra point on each side of the data
double baseline = 0;
var arrX = new double[dataX.Length + 2];
var arrY = new double[dataY.Length + 2];
Array.Copy(dataX, 0, arrX, 1, dataX.Length);
Array.Copy(dataY, 0, arrY, 1, dataY.Length);
arrX[0] = dataX[0];
arrX[arrX.Length - 1] = dataX[dataX.Length - 1];
arrY[0] = baseline;
arrY[arrY.Length - 1] = baseline;
var plt = new ScottPlot.Plot();
plt.AddPolygon(arrX, arrY, lineWidth: 1, lineColor: Color.Black);
plt.Title("Shaded Line Plot");
plt.Legend(location: ScottPlot.Alignment.LowerLeft);
TestTools.SaveFig(plt);
}
public void Test_PlotPolygon_PosAndNeg()
{
// generate sample data
Random rand = new Random(0);
var dataY = ScottPlot.DataGen.RandomWalk(rand, 1000, offset: -10);
var dataX = ScottPlot.DataGen.Consecutive(dataY.Length, spacing: 0.025);
// create an array with an extra point on each side of the data
double baseline = 0;
var xs = new double[dataX.Length + 2];
var ys = new double[dataY.Length + 2];
Array.Copy(dataX, 0, xs, 1, dataX.Length);
Array.Copy(dataY, 0, ys, 1, dataY.Length);
xs[0] = dataX[0];
xs[xs.Length - 1] = dataX[dataX.Length - 1];
ys[0] = baseline;
ys[ys.Length - 1] = baseline;
// separate the data into two arrays (for positive and negative)
double[] neg = new double[ys.Length];
double[] pos = new double[ys.Length];
for (int i = 0; i < ys.Length; i++)
{
if (ys[i] < 0)
{
neg[i] = ys[i];
}
else
{
pos[i] = ys[i];
}
}
// now plot the arrays as polygons
var plt = new ScottPlot.Plot();
plt.AddPolygon(xs, neg, lineWidth: 1, lineColor: Color.Black, fillColor: Color.Red);
plt.AddPolygon(xs, pos, lineWidth: 1, lineColor: Color.Black, fillColor: Color.Green);
plt.Title("Shaded Line Plot (negative vs. positive)");
plt.AxisAuto(0);
TestTools.SaveFig(plt);
}
public void Test_PlotPolygon_Render()
{
Random rand = new Random(0);
var plt = new ScottPlot.Plot();
for (int i = 0; i < 5; i++)
{
double[] xs = ScottPlot.DataGen.Random(rand, 3, 100);
double[] ys = ScottPlot.DataGen.Random(rand, 3, 100);
var p = plt.AddPolygon(xs, ys, lineWidth: 2, lineColor: Color.Black);
p.Label = $"polygon {i + 1}";
}
plt.Title("Polygon Example");
plt.Legend(location: ScottPlot.Alignment.LowerLeft);
TestTools.SaveFig(plt);
}
