ScottPlot.NET
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Radar with Straight Lines

Radial ticks may be rendered using straight lines instead of circles

ScottPlot.Plot myPlot = new();

double[] values = { 78, 83, 100, 76, 43 };
var radar = myPlot.Add.Radar(values);
radar.PolarAxis.StraightLines = true;

myPlot.SavePng("demo.png", 400, 300);
This recipe is one of many in the Radar Plot category