Accord.Tests.Math.MatrixTest.SubmatrixTest1 C# (CSharp) Method

        public void SubmatrixTest1()
        {
            double[,] value = new double[,]
            { 
                { 1.000, 1.000, 1.000 },
                { 2.000, 2.000, 2.000 },
                { 3.000, 3.000, 3.000 }
            };

            double[,] expected = new double[,]
            { 
                {        1.000, 1.000 },
                {        3.000, 3.000 }
            };

            int[] rowIndexes = { 0, 2 };
            int j0 = 1;
            int j1 = 2;

            double[,] actual;

            actual = Matrix.Submatrix(value, rowIndexes, j0, j1);
            Assert.IsTrue(Matrix.IsEqual(actual, expected));


            double[,] expected2 = new double[,]
            { 
                {        1.000, 1.000 },
                {        2.000, 2.000 },
                {        3.000, 3.000 }
            };

            actual = Matrix.Submatrix(value, null, j0, j1);
            Assert.IsTrue(Matrix.IsEqual(actual, expected2));

            actual = Matrix.Submatrix(value, null, null);
            Assert.IsTrue(Matrix.IsEqual(actual, value));
        }