/// <summary>
/// Computes a cumulant of the distribution.
/// </summary>
/// <param name="r">The index of the cumulant to compute.</param>
/// <returns>The rth cumulant of the distribution.</returns>
/// <seealso href="http://en.wikipedia.org/wiki/Cumulant"/>
public virtual double Cumulant(int r)
{
double[] C = CentralMoments(r);
double[] K = MomentMath.CentralToCumulant(Mean, C);
return(K[r]);
}
