Accord.Statistics.Distributions.Multivariate.DirichletDistribution.DirichletDistribution C# (CSharp) Method

        public DirichletDistribution(params double[] concentrations)
            : base(concentrations.Length)
        {
            if (concentrations.Length < 2)
                throw new DimensionMismatchException("concentrations",
                    "Concentration length must be greater than 2.");

            for (int i = 0; i < concentrations.Length; i++)
                if (concentrations[i] <= 0) throw new ArgumentOutOfRangeException("concentrations",
                    "Concentration parameters must be higher than 0.");

            this.alphas = concentrations;
            this.constant = 1.0 / Beta.Multinomial(concentrations);
        }