vcfftf - compute the Fourier coefficients of a periodic sequence. The VCFFT operations are normalized, so a call of VCFFTF followed by a call of VCFFTB will return the original sequence.
SUBROUTINE VCFFTF( M, N, X, XT, MDIMX, ROWCOL, WSAVE) CHARACTER * 1 ROWCOL COMPLEX X(MDIMX,*), XT(MDIMX,*), WSAVE(*) INTEGER M, N, MDIMX
SUBROUTINE VCFFTF_64( M, N, X, XT, MDIMX, ROWCOL, WSAVE) CHARACTER * 1 ROWCOL COMPLEX X(MDIMX,*), XT(MDIMX,*), WSAVE(*) INTEGER*8 M, N, MDIMX
SUBROUTINE FFTF( [M], [N], X, XT, [MDIMX], ROWCOL, WSAVE) CHARACTER(LEN=1) :: ROWCOL COMPLEX, DIMENSION(:) :: WSAVE COMPLEX, DIMENSION(:,:) :: X, XT INTEGER :: M, N, MDIMX
SUBROUTINE FFTF_64( [M], [N], X, XT, [MDIMX], ROWCOL, WSAVE) CHARACTER(LEN=1) :: ROWCOL COMPLEX, DIMENSION(:) :: WSAVE COMPLEX, DIMENSION(:,:) :: X, XT INTEGER(8) :: M, N, MDIMX
#include <sunperf.h>
void vcfftf(int m, int n, complex *x, complex *xt, int mdimx, char rowcol, complex *wsave);
void vcfftf_64(long m, long n, complex *x, complex *xt, long mdimx, char rowcol, complex *wsave);
X(MDIMX,N)
is an array whose first M rows
contain the sequences to be transformed. Otherwise, X(MDIMX,N)
contains data
sequences of length M stored in N columns of X.