FFTPACK

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FFTPACK is a package of Fortran subprograms for the fast Fourier transform of periodic and other symmetric sequences. It includes complex, real, sine, cosine, and quarter-wave transforms.

Reference
P.N. Swarztrauber, Vectorizing the FFTs, in Parallel Computations (G. Rodrigue, ed.), Academic Press, 1982, pp. 51--83.
Developer
Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO


file	links.html
for	related resources

file	doc
for	user guide for fftpack

file	fft.c  fft.c plus dependencies
for	C translation of much of fftpack
prec	single
by	Monty <xiphmont@mit.edu>
gams	J1a
lang	C

file	dp.tgz
for	double precision clone of fftpack
by	Hugh C. Pumphrey <hcp@met.ed.ac.uk>
prec	double
lang	Fortran
gams	J1a

file	jfftpack.tgz
for	Java translation of fftpack
by	Baoshe Zhang baoshe.zhang@uleth.ca
lang	Java
gams	J1a

file	cfftb.f  cfftb.f plus dependencies
gams	J1a2
for	FFT, backward transform (synthesis) of a complex Fourier coefficient array

file	cfftf.f  cfftf.f plus dependencies
gams	J1a2
for	FFT, forward transform of a complex periodic sequence

file	cosqf.f  cosqf.f plus dependencies
gams	J1a3
for	FFT, forward cosine transform with odd wave numbers

file	cost.f  cost.f plus dependencies
gams	J1a3
for	FFT, discrete cosine transform of a real even sequence

file	ezfftb.f  ezfftb.f plus dependencies
gams	J1a1
for	FFT, backward transform (synthesis) of a real Fourier coefficient array, simplified and slower version of (fftpack/rfftb)

file	ezfftf.f  ezfftf.f plus dependencies
gams	J1a1
for	FFT, forward transform of a real periodic sequence, simplified and slower version of (fftpack/rfftf)

file	rfftb.f  rfftb.f plus dependencies
gams	J1a1
for	FFT, backward transform (synthesis) of a real Fourier coefficient array

file	rfftf.f  rfftf.f plus dependencies
gams	J1a1
for	FFT, forward transform of a real periodic sequence

file	sinqb.f  sinqb.f plus dependencies
gams	J1a3
for	FFT, backward sine transform (synthesis) with odd wave numbers

file	sinqf.f  sinqf.f plus dependencies
gams	J1a3
for	FFT, forward sine transform with odd wave numbers

file	sint.f  sint.f plus dependencies
gams	J1a3
for	FFT, discrete sine transform of a real odd sequence

file	cffti.f  cffti.f plus dependencies
gams	-0-
for	initialization routine for (fftpack/cfftf) and (fftpack/cfftb)

file	cosqb.f  cosqb.f plus dependencies
gams	J1a3
for	FFT, backward cosine transform (synthesis) with odd wave numbers

file	cosqi.f  cosqi.f plus dependencies
gams	-0-
for	initialization routine for (fftpack/cosqf) and (fftpack/cosqb)

file	ezffti.f  ezffti.f plus dependencies
for	initialization routine for (fftpack/ezfftf) and (fftpack/ezfftb)

file	costi.f  costi.f plus dependencies
gams	-0-
for	initialization routine for (fftpack/cost)

file	rffti.f  rffti.f plus dependencies
gams	J1a1
for	initialization routine for (fftpack/rfftf) and (ftpack/rfftb)

file	sinqi.f  sinqi.f plus dependencies
gams	-0-
for	initialization routtine for (fftpack/sinqf) and (fftpack/sinqb)

file	sinti.f  sinti.f plus dependencies
gams	-0-
for	initialization routine for (fftpack/sint)

file	cfftb1.f  cfftb1.f plus dependencies

file	cfftf1.f  cfftf1.f plus dependencies

file	cffti1.f

file	changes

file	cosqb1.f  cosqb1.f plus dependencies

file	cosqf1.f  cosqf1.f plus dependencies

file	ezfft1.f

file	fftpack.mail

file	passb.f

file	passb2.f

file	passb3.f

file	passb4.f

file	passb5.f

file	passf.f

file	passf2.f

file	passf3.f

file	passf4.f

file	passf5.f

file	radb2.f

file	radb3.f

file	radb4.f

file	radb5.f

file	radbg.f

file	radf2.f

file	radf3.f

file	radf4.f

file	radf5.f

file	radfg.f

file	rfftb1.f  rfftb1.f plus dependencies

file	rfftf1.f  rfftf1.f plus dependencies

file	rffti1.f

file	sint1.f  sint1.f plus dependencies

file	test.f  test.f plus dependencies