vdsinqf(3P) Sun Performance Library vdsinqf(3P)NAMEvdsinqf - compute the Fourier coefficients in a sine series representa‐
tion with only odd wave numbers. The VSINQ operations are normalized,
so a call of VSINQF followed by a call of VSINQB will return the origi‐
nal sequence.
SYNOPSIS
SUBROUTINE VDSINQF(M, N, X, XT, MDIMX, WSAVE)
INTEGER M, N, MDIMX
DOUBLE PRECISION X(MDIMX,*), XT(MDIMX,*), WSAVE(*)
SUBROUTINE VDSINQF_64(M, N, X, XT, MDIMX, WSAVE)
INTEGER*8 M, N, MDIMX
DOUBLE PRECISION X(MDIMX,*), XT(MDIMX,*), WSAVE(*)
F95 INTERFACE
SUBROUTINE SINQF([M], [N], X, XT, [MDIMX], WSAVE)
INTEGER :: M, N, MDIMX
REAL(8), DIMENSION(:) :: WSAVE
REAL(8), DIMENSION(:,:) :: X, XT
SUBROUTINE SINQF_64([M], [N], X, XT, [MDIMX], WSAVE)
INTEGER(8) :: M, N, MDIMX
REAL(8), DIMENSION(:) :: WSAVE
REAL(8), DIMENSION(:,:) :: X, XT
C INTERFACE
#include <sunperf.h>
void vdsinqf(int m, int n, double *x, double *xt, int mdimx, double
*wsave);
void vdsinqf_64(long m, long n, double *x, double *xt, long mdimx, dou‐
ble *wsave);
ARGUMENTS
M (input)
The number of sequences to be transformed. M >= 0.
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. For VSINQF, a real two-dimensional array with
dimensions of (MDIMX x N) whose rows contain the sequences to
be transformed. On exit, the quarter-wave sine transform of
the input.
XT (input)
A real two-dimensional work array with dimensions of (MDIMX x
N).
MDIMX (input)
Leading dimension of the arrays X and XT as specified in a
dimension or type statement. MDIMX >= M.
WSAVE (input)
On entry, an array with dimension of at least (2 * N + 15),
initialized by VSINQI.
6 Mar 2009 vdsinqf(3P)
