Contents
vsinqb - synthesize a Fourier sequence from its representa-
tion in terms of a sine series with odd wave numbers. The
VSINQ operations are normalized, so a call of VSINQF fol-
lowed by a call of VSINQB will return the original sequence.
SUBROUTINE VSINQB(M, N, X, XT, MDIMX, WSAVE)
INTEGER M, N, MDIMX
REAL X(MDIMX,*), XT(MDIMX,*), WSAVE(*)
SUBROUTINE VSINQB_64(M, N, X, XT, MDIMX, WSAVE)
INTEGER*8 M, N, MDIMX
REAL X(MDIMX,*), XT(MDIMX,*), WSAVE(*)
F95 INTERFACE
SUBROUTINE SINQB([M], [N], X, XT, [MDIMX], WSAVE)
INTEGER :: M, N, MDIMX
REAL, DIMENSION(:) :: WSAVE
REAL, DIMENSION(:,:) :: X, XT
SUBROUTINE SINQB_64([M], [N], X, XT, [MDIMX], WSAVE)
INTEGER(8) :: M, N, MDIMX
REAL, DIMENSION(:) :: WSAVE
REAL, DIMENSION(:,:) :: X, XT
C INTERFACE
#include <sunperf.h>
void vsinqb(int m, int n, float *x, float *xt, int mdimx,
float *wsave);
void vsinqb_64(long m, long n, float *x, float *xt, long
mdimx, float *wsave);
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, 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 synthesis 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 speci-
fied in a dimension or type statement. MDIMX >=
M.
WSAVE (input)
On entry, an array with dimension of at least (2 *
N + 15) for vector subroutines, initialized by
VSINQI.