double[] values = { 26, 20, 23, 7, 16 };
double[] positions = { 2, 4, 8, 10, 20 };
var lollipop = plt.Add.Lollipop(values, positions);
lollipop.Orientation = ScottPlot.Orientation.Horizontal;
lollipop.MarkerColor = ScottPlot.Colors.Red;
lollipop.MarkerSize = 10;