DCMPLXFFT Procedure
Computes a complex fast Fourier transform (FFT) using double precision.
Usage
DCMPLXFFT, r_in, i_in, r_out, i_out
Input Parameters
r_in—The real part of the complex array to be transformed.
i_in—The imaginary part of the complex array to be transformed.
Output Parameters
r_out—The real part of the transformed array.
i_out—The imaginary part of the transformed array.
Keywords
Backward—If present and nonzero, an inverse FFT is computed.
Discussion
DCMPLXFFT uses the real FFT provided by FFTCOMP to compute a complex FFT in double precision.
See Also
In the PV‑WAVE Reference: FFT
