sinqb
sinqb - synthesize a Fourier sequence from its representation in terms of a sine
series with odd wave numbers. The SINQ operations 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 SINQB( N, X, WSAVE)
INTEGER N
REAL X(*), WSAVE(*)
SUBROUTINE SINQB_64( N, X, WSAVE)
INTEGER*8 N
REAL X(*), WSAVE(*)
SUBROUTINE SINQB( [N], X, WSAVE)
INTEGER :: N
REAL, DIMENSION(:) :: X, WSAVE
SUBROUTINE SINQB_64( [N], X, WSAVE)
INTEGER(8) :: N
REAL, DIMENSION(:) :: X, WSAVE
#include <sunperf.h>
void sinqb(int n, float *x, float *wsave);
void sinqb_64(long n, float *x, float *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 synthesis of the input.
-
* WSAVE (input)
-
On entry, an array with dimension of at least (3 * N + 15) for
scalar subroutines, initialized by SINQI.