public static PointPairList GetRegressionLine(this PointPairList pplTotal, double ratio)
{
var result = new PointPairList();
result.Add(new PointPair(0.0, 0.0));
if (ratio > 1)
{
double maxSample = pplTotal.Max(m => m.Y);
result.Add(new PointPair(maxSample / ratio, maxSample));
}
else
{
double maxRef = pplTotal.Max(m => m.X);
result.Add(new PointPair(maxRef, maxRef * ratio));
}
return(result);
}