Man page or keyword search:   man All Sections 1 - General Commands 2 - System Calls 3 - Subroutines, Functions 4 - Special Files 5 - File Formats 6 - Games and Screensavers 7 - Macros and Conventions 8 - Maintenence Commands 9 - Kernel Interface New Commands Server 4.4BSD AIX Alpinelinux Archlinux Aros BSDOS BSDi Bifrost CentOS Cygwin Darwin Debian DigitalUNIX DragonFly ElementaryOS Fedora FreeBSD Gentoo GhostBSD HP-UX Haiku Hurd IRIX Inferno JazzOS Kali Knoppix LinuxMint MacOSX Mageia Mandriva Manjaro Minix MirBSD NeXTSTEP NetBSD OPENSTEP OSF1 OpenBSD OpenDarwin OpenIndiana OpenMandriva OpenServer OpenSuSE OpenVMS Oracle PC-BSD Peanut Pidora Plan9 QNX Raspbian RedHat Scientific Slackware SmartOS Solaris SuSE SunOS Syllable Tru64 UNIXv7 Ubuntu Ultrix UnixWare Xenix YellowDog aLinux   20441 pages apropos Keyword Search (all sections) Output format html ascii pdf view pdf save postscript

zgebak(3P)		    Sun Performance Library		    zgebak(3P)

NAME
       zgebak  -  form	the  right  or	left eigenvectors of a complex general
       matrix by backward transformation on the computed eigenvectors  of  the
       balanced matrix output by ZGEBAL

SYNOPSIS
       SUBROUTINE ZGEBAK(JOB, SIDE, N, ILO, IHI, SCALE, M, V, LDV, INFO)

       CHARACTER * 1 JOB, SIDE
       DOUBLE COMPLEX V(LDV,*)
       INTEGER N, ILO, IHI, M, LDV, INFO
       DOUBLE PRECISION SCALE(*)

       SUBROUTINE ZGEBAK_64(JOB, SIDE, N, ILO, IHI, SCALE, M, V, LDV, INFO)

       CHARACTER * 1 JOB, SIDE
       DOUBLE COMPLEX V(LDV,*)
       INTEGER*8 N, ILO, IHI, M, LDV, INFO
       DOUBLE PRECISION SCALE(*)

   F95 INTERFACE
       SUBROUTINE GEBAK(JOB, SIDE, [N], ILO, IHI, SCALE, [M], V, [LDV],
	      [INFO])

       CHARACTER(LEN=1) :: JOB, SIDE
       COMPLEX(8), DIMENSION(:,:) :: V
       INTEGER :: N, ILO, IHI, M, LDV, INFO
       REAL(8), DIMENSION(:) :: SCALE

       SUBROUTINE GEBAK_64(JOB, SIDE, [N], ILO, IHI, SCALE, [M], V, [LDV],
	      [INFO])

       CHARACTER(LEN=1) :: JOB, SIDE
       COMPLEX(8), DIMENSION(:,:) :: V
       INTEGER(8) :: N, ILO, IHI, M, LDV, INFO
       REAL(8), DIMENSION(:) :: SCALE

   C INTERFACE
       #include <sunperf.h>

       void  zgebak(char  job,	char  side,  int  n,  int ilo, int ihi, double
		 *scale, int m, doublecomplex *v, int ldv, int *info);

       void zgebak_64(char job, char side, long n, long ilo, long ihi,	double
		 *scale, long m, doublecomplex *v, long ldv, long *info);

PURPOSE
       zgebak forms the right or left eigenvectors of a complex general matrix
       by backward transformation on the computed eigenvectors of the balanced
       matrix output by ZGEBAL.

ARGUMENTS
       JOB (input)
		 Specifies  the	 type  of  backward transformation required: =
		 'N', do nothing,  return  immediately;	 =  'P',  do  backward
		 transformation	 for  permutation  only;  =  'S',  do backward
		 transformation for scaling only; = 'B', do backward transfor‐
		 mations  for  both  permutation and scaling.  JOB must be the
		 same as the argument JOB supplied to ZGEBAL.

       SIDE (input)
		 = 'R':	 V contains right eigenvectors;
		 = 'L':	 V contains left eigenvectors.

       N (input) The number of rows of the matrix V.  N >= 0.

       ILO (input)
		 The integer ILO determined by ZGEBAL.	1 <= ILO <= IHI <=  N,
		 if N > 0; ILO=1 and IHI=0, if N=0.

       IHI (input)
		 The  integer IHI determined by ZGEBAL.	 1 <= ILO <= IHI <= N,
		 if N > 0; ILO=1 and IHI=0, if N=0.

       SCALE (input)
		 Details of the permutation and scaling factors,  as  returned
		 by ZGEBAL.

       M (input) The number of columns of the matrix V.	 M >= 0.

       V (input/output)
		 On  entry,  the  matrix  of  right or left eigenvectors to be
		 transformed, as returned by CHSEIN or CTREVC.	On exit, V  is
		 overwritten by the transformed eigenvectors.

       LDV (input)
		 The leading dimension of the array V. LDV >= max(1,N).

       INFO (output)
		 = 0:  successful exit
		 < 0:  if INFO = -i, the i-th argument had an illegal value.

				  6 Mar 2009			    zgebak(3P)

Vote for polarhome