Accord.Tests.Statistics.GeneralConfusionMatrixTest.KappaTest4 C# (CSharp) Method

        public void KappaTest4()
        {
            // Example from Congalton

            int[,] table = // Analyst #1 (page 108)
            {
                { 65,  4, 22, 24 },
                {  6, 81,  5,  8 },
                {  0, 11, 85, 19 },
                {  4,  7,  3, 90 },
            };

            GeneralConfusionMatrix target = new GeneralConfusionMatrix(table);

            Assert.AreEqual(target.RowTotals[0], 115);
            Assert.AreEqual(target.RowTotals[1], 100);
            Assert.AreEqual(target.RowTotals[2], 115);
            Assert.AreEqual(target.RowTotals[3], 104);

            Assert.AreEqual(target.ColumnTotals[0], 75);
            Assert.AreEqual(target.ColumnTotals[1], 103);
            Assert.AreEqual(target.ColumnTotals[2], 115);
            Assert.AreEqual(target.ColumnTotals[3], 141);


            Assert.AreEqual(0.65, target.Kappa, 1e-2);
            Assert.IsFalse(Double.IsNaN(target.Kappa));


            double var = target.Variance;
            double var0 = target.VarianceUnderNull;
            double varD = Accord.Statistics.Testing.KappaTest.DeltaMethodKappaVariance(target);

            Assert.AreEqual(0.0007778, varD, 1e-7);
            Assert.AreEqual(0.00076995084473426684, var, 1e-10);
            Assert.AreEqual(0.00074886435981842887, var0, 1e-10);

            Assert.IsFalse(double.IsNaN(var));
            Assert.IsFalse(double.IsNaN(var0));
            Assert.IsFalse(double.IsNaN(varD));
        }