Accord.Tests.Math.JaggedQrDecompositionTest.InverseTest C# (CSharp) Method

        public void InverseTest()
        {
            double[][] value =
            {
               new double[] {  2, -1,  0 },
               new double[] { -1,  2, -1 },
               new double[] {  0, -1,  2 }
            };

            double[][] expected =
            {
                new double[] { 0.7500,    0.5000,    0.2500},
                new double[] { 0.5000,    1.0000,    0.5000},
                new double[] { 0.2500,    0.5000,    0.7500},
            };


            var target = new JaggedQrDecomposition(value);

            double[][] actual = target.Inverse();
            Assert.IsTrue(Matrix.IsEqual(expected, actual, 1e-10));
            Assert.IsTrue(Matrix.IsEqual(value, target.Reverse(), 1e-4));

            target = new JaggedQrDecomposition(value.Transpose(), true);
            actual = target.Inverse();
            Assert.IsTrue(Matrix.IsEqual(expected, actual, 1e-10));
            Assert.IsTrue(Matrix.IsEqual(value.Transpose(), target.Reverse(), 1e-4));
        }