Accord.Tests.Math.HaarTest.FWT2DTest2 C# (CSharp) Method

        public void FWT2DTest2()
        {
            int levels = 2;

            double[,] original =
            {
                { 5, 6, 1, 2 },
                { 4, 2, 5, 5 },
                { 3, 1, 7, 1 },
                { 6, 3, 5, 1 }
            };

            double[,] data = (double[,])original.Clone();

            Haar.FWT(data, levels);

            double[,] expected = 
            {
                {  3.5625, 0.1875, 0.25, -0.25 },
                {  0.1875, 0.3125, 1.25,  2.5  },
                {  1.25,  -1.75,  -0.75, -0.25 },
                { -1.25,   0.5,   -0.25,  0.5  } 
            };

            string dataStr = data.ToString(CSharpMatrixFormatProvider.InvariantCulture);

            Assert.IsTrue(Matrix.IsEqual(expected, data, 1e-5));

            Haar.IWT(data, levels);

            Assert.IsTrue(Matrix.IsEqual(data, original, 0.0001));
        }