One-dimensional real fast Fourier transforms

Modules for class J1a1

Package CMLIB at CAMSUN|GRANTA|TIBER

EZFFTB Backward real discrete (fast) Fourier transform. Performs Fourier synthesis. Eas ...
EZFFTF Forward real discrete (fast) Fourier transform. Performs Fourier analysis. Easy ...
RFFTB Computes real periodic sequence from real Fourier coefficients. Performs Fourier ...
RFFTF Computes Fourier coefficients of real periodic sequence (fast). Performs Fourier ...
RFFTI Initialize WSAVE array for SUBROUTINE RFFTF and RFFTB.
VRFFTB Synthesis (backward transform) of multiple real periodic sequences from their Fo ...
VRFFTF Analysis (forward transform) of m ultiple real periodic sequences into Fourier co ...
VSRFTB Synthesis (backward transform) of multiple Fourier coefficients into real stagge ...
VSRFTF Analysis (forward transform) of multiple real staggered grid sequences into Four ...

Package FFTPACK at NETLIB

EZFFTB Backward real discrete (fast) Fourier transform. Performs Fourier synthesis. Eas ...
EZFFTF Forward real discrete (fast) Fourier transform. Performs Fourier analysis. Easy ...
RFFTB Computes real periodic sequence from real Fourier coefficients. Performs Fourier ...
RFFTF Computes Fourier coefficients of real periodic sequence (fast). Performs Fourier ...

Package GO at NETLIB

REALTR Completes the Fourier transform of 2n real data values, where the original data ...

Package IMSLM at GRANTA|CAMSUN|TIBER

DFFTRB (FFTRB) Compute the real periodic sequence from its Fourier coefficients.
DFF TRF (FFTRF) Compute the Fourier coefficients of a real periodic sequence.
FFTRB (DFFTRB) Compute the real periodic sequence from its Fourier coefficients.
FFTRF (DFFTRF) Compute the Fourier coefficients of a real periodic sequence.

Package IMSLS at GRANTA|CAMSUN|TIBER

DFFTRB (FFTRB) Compute the real periodic sequence from its Fourier coefficients.
DFF TRF (FFTRF) Compute the Fourier coefficients of a real periodic sequence.
FFTRB (DFFTRB) Compute the real periodic sequence from its Fourier coefficients.
FFTRF (DFFTRF) Compute the Fourier coefficients of a real periodic sequence.

Package NAG at GRANTA

C06EAE Calculates the discrete Fourier transform of a sequence of N real data values. ( ...
C06EAF Calculates the discrete Fourier transform of a sequence of N real data values. ( ...
C06FAE Calculates the discrete Fourier transform of a sequence of N real data values (u .. .
C06FAF Calculates the discrete Fourier transform of a sequence of N real data values (u ...
C06FPE Computes the discrete Fourier transforms of M sequences, each containing N real ...
C06FPF Computes the discrete Fourier transforms of M sequences, each containing N real ...
C06FQE Comput es the discrete Fourier transforms of M Hermitian sequences, each containi ...
C06FQF Computes the discrete Fourier transforms of M Hermitian sequences, each containi ...

Package NMS at TIBER

DEZFTB (EZFFTB) Backward FFT of N data points in AZERO,A(N/2),B(N/2). Returns data in R(N).
DEZFTF (EZFFTF) Forward FFT of N data points R(N). Returns A(N/2) and B(N/2) as cosine and sine ...
EZFFTB (DEZFTB) Backward FFT of N data points in AZERO,A(N/2),B(N/2). Returns data in R(N).
EZFFTF (DEZFTF) Forward FFT of N data points R(N). Returns A(N/2) and B(N/2) as cosine and sine ...

Package PORT at GRANTA|CAMSUN|TIBER

DFFTR (FFTR) Mixed radix fast Fourier transform to find the transform of 2N real data points.
DFFTRI (FFTRI) Finds the inverse Fourier transform using Fourier coefficients assumed to arise ...
DMFTCR (MFTCR) Multiple complex to real Fourier transform. Computes multiple discr ete Fourier t ...
DMFTRC (MFTRC) Multiple real to complex Fourier transform. Computes multiple discrete Fourier t ...
DRLTR (RLTR) An auxiliary routine for use together with FFT to transform 2N real data points.
FFTR (DFFTR) Mixed radix fast Fourier transform to find the transform of 2N real data points.
FFTRI (DFFTRI) Finds the inverse Fourier transform using Fourier coefficients assumed to arise ...
MFTCR (DMFTCR) Multiple complex to real Fourier transform. Computes multiple discrete Fourier t ...
MFTRC (DMFTRC) Multiple real to complex Fourier transform. Computes multiple discrete Fourier t ...
RLTR (DRLTR) An auxiliary routine for use together with FFT to transform 2N real data points.

Package SCILIB at GRANTA|TIBER

CRFFT2 Applies a complex-to-real Fast Fourier Transform (FFT).
RCFFT2 Applie s a real-to-complex Fast Fourier Transform (FFT).
RFFTMLT Applies complex-to-real or real-to-complex Fast Fourier Transforms (FFT) on mult ...

Package SLATEC at GRANTA|CAMSUN

Package STARPAC at GRANTA|TIBER

FFTLEN Compute the minimum extended series length for using the Singleton FFT; return t ...
FFTR Compute the Fourier coefficients of an input series of observations; retu ...

Package TOMS at NETLIB

545 CMFFT and RMFFT: Fortran subprograms for computing real and complex fast Fourier ...

Package VECLIB at TIBER

CRC1FT (ZRC1FT) Real-to-Complex One-Dimensional FFT, Full Storage Mode: Computes either the forw ...
CRCFTS (ZRCFTS) Simultaneous Real-to-Complex 1-D FFT, Full Storage Mode: Given a number of 1-D d ...
DRC1FT (SRC1FT) Real-to-Complex 1-D FFT, Storage Conserving Mode: Given a set of real data in a ...
DRCFTS (SRCFTS) Simultaneous Real-to-Complex 1-D FFT, Storage Conserving Mode: Given a number of ...
SRC1FT (DRC1FT) Real-to-Complex 1-D FFT, Storage Conserving Mode: Gi ven a set of real data in a ...
SRCFTS (DRCFTS) Simultaneous Real-to-Complex 1-D FFT, Storage Conserving Mode: Given a number of ...
ZRC1FT (CRC1FT) Real-to-Complex One-Dimensional FFT, Full Storage Mode: Computes either the forw ...
ZRCFTS (CRCFTS) Simultaneous Real -to-Complex 1-D FFT, Full Storage Mode: Given a number of 1-D d ...

Package VFFTPK at NETLIB

VRFFTB Synthesis (backward transform) of multiple real periodic sequences from their Fo ...
VRFFTF Analysis (forward transform) of multiple real periodic sequences into Fourier co ...