FFTDOC(3)

SYNOPSIS
SUBROUTINE FFTDOC

NAME
fftdoc - Documentation for FFTPACK, a collection of Fast Fourier Transform routines.

LIBRARY
SLATEC

CATEGORY
J1, Z

TYPE
ALL (FFTDOC-A)

KEYWORDS
DOCUMENTATION, FAST FOURIER TRANSFORM, FFT

AUTHOR
Swarztrauber, P. N., (NCAR)

DESCRIPTION
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Version 3 June 1979 A Package of Fortran Subprograms for The Fast Fourier Transform of Periodic and Other Symmetric Sequences By Paul N Swarztrauber National Center For Atmospheric Research, Boulder, Colorado 80307 which is sponsored by the National Science Foundation * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * This package consists of programs which perform Fast Fourier Transforms for both complex and real periodic sequences and certain other symmetric sequences that are listed below. 1. RFFTI Initialize RFFTF and RFFTB 2. RFFTF Forward transform of a real periodic sequence 3. RFFTB Backward transform of a real coefficient array 4. EZFFTI Initialize EZFFTF and EZFFTB 5. EZFFTF A simplified real periodic forward transform 6. EZFFTB A simplified real periodic backward transform 7. SINTI Initialize SINT 8. SINT Sine transform of a real odd sequence 9. COSTI Initialize COST 10. COST Cosine transform of a real even sequence 11. SINQI Initialize SINQF and SINQB 12. SINQF Forward sine transform with odd wave numbers 13. SINQB Unnormalized inverse of SINQF 14. COSQI Initialize COSQF and COSQB 15. COSQF Forward cosine transform with odd wave numbers 16. COSQB Unnormalized inverse of COSQF 17. CFFTI Initialize CFFTF and CFFTB 18. CFFTF Forward transform of a complex periodic sequence 19. CFFTB Unnormalized inverse of CFFTF

REFERENCES
(NONE)

ROUTINES CALLED
(NONE)

REVISION HISTORY (YYMMDD)
780201 DATE WRITTEN
861211 REVISION DATE from Version 3.2
891214 Prologue converted to Version 4.0 format. (BAB)
900723 PURPOSE section revised. (WRB)