Contents
dsinqf - compute the Fourier coefficients in a sine series
representation with only odd wave numbers. The SINQ opera-
tions are unnormalized inverses of themselves, so a call to
SINQF followed by a call to SINQB will multiply the input
sequence by 4 * N.
SUBROUTINE DSINQF(N, X, WSAVE)
INTEGER N
DOUBLE PRECISION X(*), WSAVE(*)
SUBROUTINE DSINQF_64(N, X, WSAVE)
INTEGER*8 N
DOUBLE PRECISION X(*), WSAVE(*)
F95 INTERFACE
SUBROUTINE SINQF([N], X, WSAVE)
INTEGER :: N
REAL(8), DIMENSION(:) :: X, WSAVE
SUBROUTINE SINQF_64([N], X, WSAVE)
INTEGER(8) :: N
REAL(8), DIMENSION(:) :: X, WSAVE
C INTERFACE
#include <sunperf.h>
void dsinqf(int n, double *x, double *wsave);
void dsinqf_64(long n, double *x, double *wsave);
N (input) Length of the sequence to be transformed. These
subroutines are most efficient when N is a product
of small primes. N >= 0.
X (input/output)
On entry, an array of length N containing the
sequence to be transformed. On exit, the
quarter-wave sine transform of the input.
WSAVE (input)
On entry, an array with dimension of at least (3
* N + 15) for scalar subroutines, initialized by
SINQI.