mirror of
https://git.planet-casio.com/Lephenixnoir/OpenLibm.git
synced 2025-01-01 06:23:39 +01:00
66 lines
2.4 KiB
Fortran
66 lines
2.4 KiB
Fortran
*DECK FFTDOC
|
|
SUBROUTINE FFTDOC
|
|
C***BEGIN PROLOGUE FFTDOC
|
|
C***PURPOSE Documentation for FFTPACK, a collection of Fast Fourier
|
|
C Transform routines.
|
|
C***LIBRARY SLATEC
|
|
C***CATEGORY J1, Z
|
|
C***TYPE ALL (FFTDOC-A)
|
|
C***KEYWORDS DOCUMENTATION, FAST FOURIER TRANSFORM, FFT
|
|
C***AUTHOR Swarztrauber, P. N., (NCAR)
|
|
C***DESCRIPTION
|
|
C
|
|
C * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
|
C Version 3 June 1979
|
|
C
|
|
C A Package of Fortran Subprograms for The Fast Fourier
|
|
C Transform of Periodic and Other Symmetric Sequences
|
|
C By
|
|
C Paul N Swarztrauber
|
|
C
|
|
C National Center For Atmospheric Research, Boulder, Colorado 80307
|
|
C which is sponsored by the National Science Foundation
|
|
C
|
|
C * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
|
C
|
|
C This package consists of programs which perform Fast Fourier
|
|
C Transforms for both complex and real periodic sequences and
|
|
C certain other symmetric sequences that are listed below.
|
|
C
|
|
C 1. RFFTI Initialize RFFTF and RFFTB
|
|
C 2. RFFTF Forward transform of a real periodic sequence
|
|
C 3. RFFTB Backward transform of a real coefficient array
|
|
C
|
|
C 4. EZFFTI Initialize EZFFTF and EZFFTB
|
|
C 5. EZFFTF A simplified real periodic forward transform
|
|
C 6. EZFFTB A simplified real periodic backward transform
|
|
C
|
|
C 7. SINTI Initialize SINT
|
|
C 8. SINT Sine transform of a real odd sequence
|
|
C
|
|
C 9. COSTI Initialize COST
|
|
C 10. COST Cosine transform of a real even sequence
|
|
C
|
|
C 11. SINQI Initialize SINQF and SINQB
|
|
C 12. SINQF Forward sine transform with odd wave numbers
|
|
C 13. SINQB Unnormalized inverse of SINQF
|
|
C
|
|
C 14. COSQI Initialize COSQF and COSQB
|
|
C 15. COSQF Forward cosine transform with odd wave numbers
|
|
C 16. COSQB Unnormalized inverse of COSQF
|
|
C
|
|
C 17. CFFTI Initialize CFFTF and CFFTB
|
|
C 18. CFFTF Forward transform of a complex periodic sequence
|
|
C 19. CFFTB Unnormalized inverse of CFFTF
|
|
C
|
|
C***REFERENCES (NONE)
|
|
C***ROUTINES CALLED (NONE)
|
|
C***REVISION HISTORY (YYMMDD)
|
|
C 780201 DATE WRITTEN
|
|
C 861211 REVISION DATE from Version 3.2
|
|
C 891214 Prologue converted to Version 4.0 format. (BAB)
|
|
C 900723 PURPOSE section revised. (WRB)
|
|
C***END PROLOGUE FFTDOC
|
|
C***FIRST EXECUTABLE STATEMENT FFTDOC
|
|
RETURN
|
|
END
|