vdcosqb (3p)

Name

vdcosqb - synthesize a Fourier sequence from its representation in terms of a cosine series with odd wave numbers. The VCOSQ operations are normalized, so a call of VCOSQF followed by a call of VCOSQB will return the original sequence.

Synopsis

SUBROUTINE VDCOSQB(M, N, X, XT, MDIMX, WSAVE)

INTEGER M, N, MDIMX
DOUBLE PRECISION X(MDIMX,*), XT(MDIMX,*), WSAVE(*)

SUBROUTINE VDCOSQB_64(M, N, X, XT, MDIMX, WSAVE)

INTEGER*8 M, N, MDIMX
DOUBLE PRECISION X(MDIMX,*), XT(MDIMX,*), WSAVE(*)




F95 INTERFACE
SUBROUTINE COSQB(M, N, X, XT, MDIMX, WSAVE)

INTEGER :: M, N, MDIMX
REAL(8), DIMENSION(:) :: WSAVE
REAL(8), DIMENSION(:,:) :: X, XT

SUBROUTINE COSQB_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 vdcosqb(int m, int n, double *x, double  *xt,  int  mdimx,  double
*wsave);

void vdcosqb_64(long m, long n, double *x, double *xt, long mdimx, dou-
ble *wsave);

Description

Oracle Solaris Studio Performance Library                          vdcosqb(3P)



NAME
       vdcosqb  -  synthesize  a  Fourier  sequence from its representation in
       terms of a cosine series with odd wave numbers.  The  VCOSQ  operations
       are  normalized,  so a call of VCOSQF followed by a call of VCOSQB will
       return the original sequence.


SYNOPSIS
       SUBROUTINE VDCOSQB(M, N, X, XT, MDIMX, WSAVE)

       INTEGER M, N, MDIMX
       DOUBLE PRECISION X(MDIMX,*), XT(MDIMX,*), WSAVE(*)

       SUBROUTINE VDCOSQB_64(M, N, X, XT, MDIMX, WSAVE)

       INTEGER*8 M, N, MDIMX
       DOUBLE PRECISION X(MDIMX,*), XT(MDIMX,*), WSAVE(*)




   F95 INTERFACE
       SUBROUTINE COSQB(M, N, X, XT, MDIMX, WSAVE)

       INTEGER :: M, N, MDIMX
       REAL(8), DIMENSION(:) :: WSAVE
       REAL(8), DIMENSION(:,:) :: X, XT

       SUBROUTINE COSQB_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 vdcosqb(int m, int n, double *x, double  *xt,  int  mdimx,  double
                 *wsave);

       void vdcosqb_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, the rows contain the sequences to  be  transformed.
                 On exit, the quarter-wave cosine synthesis of the input.


       XT (input)
                 A work array.


       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 of dimension (2 * N + 15) or greater  ini-
                 tialized by VCOSQI.




                                  7 Nov 2015                       vdcosqb(3P)