Accord.Tests.Math.HaarTest.FWT2DTest C# (CSharp) Method

        public void FWT2DTest()
        {
            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, 1);

            double[,] expected = 
            {
                {  4.25,  3.25,  0.25, -0.25 },
                {  3.25,  3.5,   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, 1);

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