public static double 連続分布の相加平均(double x, XY[] items)
{
if (!items.Any()) throw new ArgumentException();
if (x > items.Last().X) throw new ArgumentException();
if (1 == items.Length)
{
return items[0].Y;
}
return Func6( x, items ) / ( items.Last().X - Math.Max( x, items.First().X ) );
}
// x以降の面積
public static double Func6(double x, XY[] items)
{
if (x <= items.First().X)
{
var intervals = Interval.GetIntervals(items);
return Func7(intervals);
}
else
{
var intervals = Interval.GetIntervals(items).SkipWhile(a => x < a.A.X || x > a.B.X).ToArray();
var first = intervals.First();
first.A = new XY(x, CalcY(x, first.A.X, first.A.Y, first.B.X, first.B.Y));
return Func7(intervals);
}
}