*nix Documentation Project
·  Home
 +   man pages
·  Linux HOWTOs
·  FreeBSD Tips
·  *niX Forums

  man pages->IRIX man pages -> complib/zlaqge (3)              
Title
Content
Arch
Section
 

Contents


ZLAQGE(3F)							    ZLAQGE(3F)


NAME    [Toc]    [Back]

     ZLAQGE - equilibrate a general M by N matrix A using the row and scaling
     factors in	the vectors R and C

SYNOPSIS    [Toc]    [Back]

     SUBROUTINE	ZLAQGE(	M, N, A, LDA, R, C, ROWCND, COLCND, AMAX, EQUED	)

	 CHARACTER	EQUED

	 INTEGER	LDA, M,	N

	 DOUBLE		PRECISION AMAX,	COLCND,	ROWCND

	 DOUBLE		PRECISION C( * ), R( * )

	 COMPLEX*16	A( LDA,	* )

PURPOSE    [Toc]    [Back]

     ZLAQGE equilibrates a general M by	N matrix A using the row and scaling
     factors in	the vectors R and C.

ARGUMENTS    [Toc]    [Back]

     M	     (input) INTEGER
	     The number	of rows	of the matrix A.  M >= 0.

     N	     (input) INTEGER
	     The number	of columns of the matrix A.  N >= 0.

     A	     (input/output) COMPLEX*16 array, dimension	(LDA,N)
	     On	entry, the M by	N matrix A.  On	exit, the equilibrated matrix.
	     See EQUED for the form of the equilibrated	matrix.

     LDA     (input) INTEGER
	     The leading dimension of the array	A.  LDA	>= max(M,1).

     R	     (input) DOUBLE PRECISION array, dimension (M)
	     The row scale factors for A.

     C	     (input) DOUBLE PRECISION array, dimension (N)
	     The column	scale factors for A.

     ROWCND  (input) DOUBLE PRECISION
	     Ratio of the smallest R(i)	to the largest R(i).

     COLCND  (input) DOUBLE PRECISION
	     Ratio of the smallest C(i)	to the largest C(i).

     AMAX    (input) DOUBLE PRECISION
	     Absolute value of largest matrix entry.





									Page 1






ZLAQGE(3F)							    ZLAQGE(3F)



     EQUED   (output) CHARACTER*1
	     Specifies the form	of equilibration that was done.	 = 'N':	 No
	     equilibration
	     = 'R':  Row equilibration,	i.e., A	has been premultiplied by
	     diag(R).  = 'C':  Column equilibration, i.e., A has been
	     postmultiplied by diag(C).	 = 'B':	 Both row and column
	     equilibration, i.e., A has	been replaced by diag(R) * A *
	     diag(C).

PARAMETERS    [Toc]    [Back]

     THRESH is a threshold value used to decide	if row or column scaling
     should be done based on the ratio of the row or column scaling factors.
     If	ROWCND < THRESH, row scaling is	done, and if COLCND < THRESH, column
     scaling is	done.

     LARGE and SMALL are threshold values used to decide if row	scaling	should
     be	done based on the absolute size	of the largest matrix element.	If
     AMAX > LARGE or AMAX < SMALL, row scaling is done.
ZLAQGE(3F)							    ZLAQGE(3F)


NAME    [Toc]    [Back]

     ZLAQGE - equilibrate a general M by N matrix A using the row and scaling
     factors in	the vectors R and C

SYNOPSIS    [Toc]    [Back]

     SUBROUTINE	ZLAQGE(	M, N, A, LDA, R, C, ROWCND, COLCND, AMAX, EQUED	)

	 CHARACTER	EQUED

	 INTEGER	LDA, M,	N

	 DOUBLE		PRECISION AMAX,	COLCND,	ROWCND

	 DOUBLE		PRECISION C( * ), R( * )

	 COMPLEX*16	A( LDA,	* )

PURPOSE    [Toc]    [Back]

     ZLAQGE equilibrates a general M by	N matrix A using the row and scaling
     factors in	the vectors R and C.

ARGUMENTS    [Toc]    [Back]

     M	     (input) INTEGER
	     The number	of rows	of the matrix A.  M >= 0.

     N	     (input) INTEGER
	     The number	of columns of the matrix A.  N >= 0.

     A	     (input/output) COMPLEX*16 array, dimension	(LDA,N)
	     On	entry, the M by	N matrix A.  On	exit, the equilibrated matrix.
	     See EQUED for the form of the equilibrated	matrix.

     LDA     (input) INTEGER
	     The leading dimension of the array	A.  LDA	>= max(M,1).

     R	     (input) DOUBLE PRECISION array, dimension (M)
	     The row scale factors for A.

     C	     (input) DOUBLE PRECISION array, dimension (N)
	     The column	scale factors for A.

     ROWCND  (input) DOUBLE PRECISION
	     Ratio of the smallest R(i)	to the largest R(i).

     COLCND  (input) DOUBLE PRECISION
	     Ratio of the smallest C(i)	to the largest C(i).

     AMAX    (input) DOUBLE PRECISION
	     Absolute value of largest matrix entry.





									Page 1






ZLAQGE(3F)							    ZLAQGE(3F)



     EQUED   (output) CHARACTER*1
	     Specifies the form	of equilibration that was done.	 = 'N':	 No
	     equilibration
	     = 'R':  Row equilibration,	i.e., A	has been premultiplied by
	     diag(R).  = 'C':  Column equilibration, i.e., A has been
	     postmultiplied by diag(C).	 = 'B':	 Both row and column
	     equilibration, i.e., A has	been replaced by diag(R) * A *
	     diag(C).

PARAMETERS    [Toc]    [Back]

     THRESH is a threshold value used to decide	if row or column scaling
     should be done based on the ratio of the row or column scaling factors.
     If	ROWCND < THRESH, row scaling is	done, and if COLCND < THRESH, column
     scaling is	done.

     LARGE and SMALL are threshold values used to decide if row	scaling	should
     be	done based on the absolute size	of the largest matrix element.	If
     AMAX > LARGE or AMAX < SMALL, row scaling is done.


									PPPPaaaaggggeeee 2222
[ Back ]
 Similar pages
Name OS Title
claqhe IRIX equilibrate a Hermitian matrix A using the scaling factors in the vector S
claqsp IRIX equilibrate a symmetric matrix A using the scaling factors in the vector S
slaqsp IRIX equilibrate a symmetric matrix A using the scaling factors in the vector S
claqhp IRIX equilibrate a Hermitian matrix A using the scaling factors in the vector S
dlaqsp IRIX equilibrate a symmetric matrix A using the scaling factors in the vector S
dlaqsy IRIX equilibrate a symmetric matrix A using the scaling factors in the vector S
zlaqsy IRIX equilibrate a symmetric matrix A using the scaling factors in the vector S
zlaqhp IRIX equilibrate a Hermitian matrix A using the scaling factors in the vector S
zlaqhe IRIX equilibrate a Hermitian matrix A using the scaling factors in the vector S
claqsy IRIX equilibrate a symmetric matrix A using the scaling factors in the vector S
Copyright © 2004-2005 DeniX Solutions SRL
newsletter delivery service