|   | Name | Description | 
|---|
   | ForwardReal(Double, Int32, FourierOptions) | 
            Packed Real-Complex forward Fast Fourier Transform (FFT) to arbitrary-length sample vectors.
            Since for real-valued time samples the complex spectrum is conjugate-even (symmetry),
            the spectrum can be fully reconstructed form the positive frequencies only (first half).
            The data array needs to be N+2 (if N is even) or N+1 (if N is odd) long in order to support such a packed spectrum.
             | 
   | ForwardReal(Single, Int32, FourierOptions) | 
            Packed Real-Complex forward Fast Fourier Transform (FFT) to arbitrary-length sample vectors.
            Since for real-valued time samples the complex spectrum is conjugate-even (symmetry),
            the spectrum can be fully reconstructed from the positive frequencies only (first half).
            The data array needs to be N+2 (if N is even) or N+1 (if N is odd) long in order to support such a packed spectrum.
             |