Real

 1using System;
 2using FinMath.SignalProcessing;
 3using FinMath.Statistics;
 4
 5namespace FinMath.Samples
 6{
 7    class FourierTransformReal
 8    {
 9        static void Main()
10        {
11            // Create random generator.
12            RandomGenerator random = new RandomGenerator();
13
14            // Create arrays.
15            Double[] input = new Double[7];
16            Complex[] output = new Complex[7];
17            Double[] result = new Double[7];
18
19            // Generate random series of numbers.
20            random.NextSeries(input);
21            Console.WriteLine("Input = ");
22            Console.Write(input[0].ToString("0.000"));
23            for (Int32 i = 1; i < input.Length; ++i)
24                Console.Write(", " + input[i].ToString("0.000"));
25            Console.WriteLine(Environment.NewLine);
26
27            // Create a new instance of RealDFT1D.
28            RealDFT1D dft = new RealDFT1D(7);
29
30            // Set forward and backward scale factors.
31            dft.ForwardScaleFactor = 1.0 / 7;
32            dft.BackwardScaleFactor = 1.0;
33
34            // Compute forward transform.
35            dft.ComputeForward(input, output);
36            Console.WriteLine("Output = ");
37            Console.Write(output[0].ToString("0.000"));
38            for (Int32 i = 1; i < output.Length; ++i)
39                Console.Write(", " + output[i].ToString("0.000"));
40            Console.WriteLine(Environment.NewLine);
41
42            // Compute backward transform.
43            dft.ComputeBackward(output, result);
44            Console.WriteLine("Result = ");
45            Console.Write(result[0].ToString("0.000"));
46            for (Int32 i = 1; i < result.Length; ++i)
47                Console.Write(", " + result[i].ToString("0.000"));
48            Console.WriteLine(Environment.NewLine);
49        }
50    }
51}