DCL:MATH2:FFTLIB: Fast Fourier Transformation
A subroutine group that performs Fourier transformations on cyclic floating-point data
RFFTI(N,WSAVE) | Initializes. |
RFFTF(N,R,WSAVE) | Performs forward Fourier transformation. |
RFFTB(N,R,WSAVE) | Performs inverse Fourier transformation. |
A simplified subroutine group of RFFTI, RFFTF, and RFFTB
EZFFTI(N,WSAVE) | Initializes. |
EZFFTF(N,R,A0,A,B,WSAVE) | Performs forward Fourier transformation. |
EZFFTB(N,R,A0,A,B,WSAVE) | Performs inverse Fourier transformation. |
A subroutine group that performs SINE transformation on odd cyclic data
SINTI(N,WSAVE) | Initializes. |
SINT(N,X,WSAVE) | Performs sine transformation. |
A subroutine group that performs COSINE transformation on even cyclic data
COSTI(N,WSAVE) | Initializes. |
COST(N,X,WSAVE) | Performs cosine transformation. |
A subroutine group that performs SINE transformation only on odd wavenumber components
SINQI(N,WSAVE) | Initializes. |
SINQF(N,X,WSAVE) | Performs forward sine transformation. |
SINQB(N,X,WSAVE) | Performs inverse sine transformation. |
A subroutine group that performs COSINE transformation only on even wavenumber components
COSQI(N,WSAVE) | Initializes. |
COSQF(N,X,WSAVE) | Performs forward cosine transformation. |
COSQB(N,X,WSAVE) | Performs inverse cosine transformation. |
A subroutine group that performs Fourier transformations on cyclic complex data
CFFTI(N,WSAVE) | Initializes |
CFFTF(N,C,WSAVE) | Performs forward Fourier transformation. |
CFFTB(N,C,WSAVE) | Performs inverse Fourier transformation. |