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. |