public void Test_CrossHair_DateTime()
{
var plt = new ScottPlot.Plot(400, 300);
plt.Title("Crosshair with DateTime Axis");
plt.XLabel("Horizontal Axis");
plt.YLabel("Vertical Axis");
// plot DateTime data on the horizontal axis
int pointCount = 100;
Random rand = new(0);
double[] ys = ScottPlot.DataGen.RandomWalk(rand, pointCount);
double[] xs = Enumerable.Range(0, pointCount)
.Select(x => new DateTime(2016, 06, 27).AddDays(x))
.Select(x => x.ToOADate()).ToArray();
plt.AddScatter(xs, ys);
plt.XAxis.DateTimeFormat(true);
// add a crosshair
var ch = plt.AddCrosshair(xs[50], ys[50]);
// indicaite horizontal axis is DateTime and give a proper DateTime format string
// https://docs.microsoft.com/en-us/dotnet/standard/base-types/custom-date-and-time-format-strings
ch.IsDateTimeX = true;
ch.StringFormatX = "d";
// use a numeric vertical axis but customize the format string
// https://docs.microsoft.com/en-us/dotnet/standard/base-types/standard-numeric-format-strings
ch.IsDateTimeY = false;
ch.StringFormatY = "F4";
TestTools.SaveFig(plt);
}
public void Test_CrossHair_Renders()
{
var plt = new ScottPlot.Plot(400, 300);
plt.AddSignal(ScottPlot.DataGen.Sin(51));
plt.AddSignal(ScottPlot.DataGen.Cos(51));
plt.Title("Crosshair Demo");
plt.XLabel("Horizontal Axis");
plt.YLabel("Vertical Axis");
plt.AddCrosshair(42, 0.45);
// this is outside the data area so should not be rendered
plt.AddCrosshair(-5, -1.2);
TestTools.SaveFig(plt);
}
