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FillY From Scatter Plots

FillY plots can be created from two scatter plots that share the same X values.

This code sample is specific to ScottPlot 5 (details)
ScottPlot.Plot myPlot = new();

RandomDataGenerator dataGen = new(0);

int count = 20;
double[] xs = Generate.Consecutive(count);
double[] ys1 = dataGen.RandomWalk(count, offset: -5);
double[] ys2 = dataGen.RandomWalk(count, offset: 5);

var scatter1 = myPlot.Add.Scatter(xs, ys1);
var scatter2 = myPlot.Add.Scatter(xs, ys2);

var xyy = myPlot.Add.FillY(scatter1, scatter2);
xyy.FillStyle.Color = Colors.Blue.WithAlpha(100);

myPlot.SavePng("demo.png", 400, 300);

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