Accord.Statistics.Analysis.GeneralConfusionMatrix.Combine C# (CSharp) Method

        public static GeneralConfusionMatrix Combine(params GeneralConfusionMatrix[] matrices)
        {
            if (matrices == null)
                throw new ArgumentNullException("matrices");
            if (matrices.Length == 0)
                throw new ArgumentException("At least one confusion matrix is required.", "matrices");

            int classes = matrices[0].Classes;
            int[,] total = new int[classes, classes];

            foreach (var matrix in matrices)
            {
                if (matrix.Classes != classes)
                    throw new ArgumentException("The number of classes in one of the matrices differs.");

                for (int j = 0; j < classes; j++)
                    for (int k = 0; k < classes; k++)
                        total[j, k] += matrix.Matrix[j, k];
            }

            return new GeneralConfusionMatrix(total);
        }
    }