Discrete Fourier Transform

The following tables show discrete fourier transform provided by NLCPy.

Standard FFTs

nlcpy.fft.fft	Computes the one-dimensional discrete fourier transform.
nlcpy.fft.ifft	Computes the one-dimensional inverse discrete fourier transform.
nlcpy.fft.fft2	Computes the 2-dimensional discrete fourier transform.
nlcpy.fft.ifft2	Computes the 2-dimensional inverse discrete fourier transform.
nlcpy.fft.fftn	Computes the n-dimensional discrete fourier transform.
nlcpy.fft.ifftn	Computes the n-dimensional inverse discrete fourier transform.

Real FFTs

nlcpy.fft.rfft	Computes the one-dimensional discrete fourier transform for a real array.
nlcpy.fft.irfft	Computes the inverse of the n-point DFT for a real array.
nlcpy.fft.rfft2	Computes the 2-dimensional FFT of a real array.
nlcpy.fft.irfft2	Computes the 2-dimensional inverse FFT of a real array.
nlcpy.fft.rfftn	Computes the n-dimensional discrete fourier transform for a real array.
nlcpy.fft.irfftn	Computes the inverse of the n-dimensional FFT of a real array.

Hermitian FFTs

nlcpy.fft.hfft	Computes the FFT of a signal that has Hermitian symmetry, i.e., a real spectrum.
nlcpy.fft.ihfft	Computes the inverse FFT of a signal that has Hermitian symmetry.

Helper routines

nlcpy.fft.fftfreq	Returns the Discrete fourier transform sample frequencies.
nlcpy.fft.rfftfreq	Returns the Discrete fourier transform sample frequencies (for usage with rfft(), irfft()).
nlcpy.fft.fftshift	Shifts the zero-frequency component to the center of the spectrum.
nlcpy.fft.ifftshift	The inverse of fftshift.