dsint(3P) Sun Performance Library dsint(3P)NAMEdsint - compute the discrete Fourier sine transform of an odd sequence.
The SINT transforms are unnormalized inverses of themselves, so a call
of SINT followed by another call of SINT will multiply the input
sequence by 2 * (N+1).
SYNOPSIS
SUBROUTINE DSINT(N, X, WSAVE)
INTEGER N
DOUBLE PRECISION X(*), WSAVE(*)
SUBROUTINE DSINT_64(N, X, WSAVE)
INTEGER*8 N
DOUBLE PRECISION X(*), WSAVE(*)
F95 INTERFACE
SUBROUTINE SINT([N], X, WSAVE)
INTEGER :: N
REAL(8), DIMENSION(:) :: X, WSAVE
SUBROUTINE SINT_64([N], X, WSAVE)
INTEGER(8) :: N
REAL(8), DIMENSION(:) :: X, WSAVE
C INTERFACE
#include <sunperf.h>
void dsint(int n, double *x, double *wsave);
void dsint_64(long n, double *x, double *wsave);
ARGUMENTS
N (input) Length of the sequence to be transformed. These subroutines
are most efficient when N+1 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 sine transform of the input.
WSAVE (input/output)
On entry, an array with dimension of at least int(2.5 * N +
15) initialized by SINTI.
6 Mar 2009 dsint(3P)
