Accord.Tests.Statistics.KernelPrincipalComponentAnalysisTest.RevertTest C# (CSharp) Method

        public void RevertTest()
        {
            // Using a linear kernel should be equivalent to standard PCA
            IKernel kernel = new Linear();

            // Create analysis
            var target = new KernelPrincipalComponentAnalysis(data, kernel, AnalysisMethod.Center);

            // Compute
            target.Compute();

            // Compute image
            double[,] image = target.Transform(data, 2);

            // Compute pre-image
            double[,] preimage = target.Revert(image);

            // Check if pre-image equals the original data
            Assert.IsTrue(Matrix.IsEqual(data, preimage, 0.0001));
        }