CLAQHE man page on IRIX

Man page or keyword search:  
man Server   31559 pages
apropos Keyword Search (all sections)
Output format
IRIX logo
[printable version]



CLAQHE(3F)							    CLAQHE(3F)

NAME
     CLAQHE - equilibrate a Hermitian matrix A using the scaling factors in
     the vector S

SYNOPSIS
     SUBROUTINE CLAQHE( UPLO, N, A, LDA, S, SCOND, AMAX, EQUED )

	 CHARACTER	EQUED, UPLO

	 INTEGER	LDA, N

	 REAL		AMAX, SCOND

	 REAL		S( * )

	 COMPLEX	A( LDA, * )

PURPOSE
     CLAQHE equilibrates a Hermitian matrix A using the scaling factors in the
     vector S.

ARGUMENTS
     UPLO    (input) CHARACTER*1
	     Specifies whether the upper or lower triangular part of the
	     Hermitian matrix A is stored.  = 'U':  Upper triangular
	     = 'L':  Lower triangular

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

     A	     (input/output) COMPLEX array, dimension (LDA,N)
	     On entry, the Hermitian matrix A.	If UPLO = 'U', the leading n
	     by n upper triangular part of A contains the upper triangular
	     part of the matrix A, and the strictly lower triangular part of A
	     is not referenced.	 If UPLO = 'L', the leading n by n lower
	     triangular part of A contains the lower triangular part of the
	     matrix A, and the strictly upper triangular part of A is not
	     referenced.

	     On exit, if EQUED = 'Y', the equilibrated matrix:	diag(S) * A *
	     diag(S).

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

     S	     (input) REAL array, dimension (N)
	     The scale factors for A.

     SCOND   (input) REAL
	     Ratio of the smallest S(i) to the largest S(i).

									Page 1

CLAQHE(3F)							    CLAQHE(3F)

     AMAX    (input) REAL
	     Absolute value of largest matrix entry.

     EQUED   (output) CHARACTER*1
	     Specifies whether or not equilibration was done.  = 'N':  No
	     equilibration.
	     = 'Y':  Equilibration was done, i.e., A has been replaced by
	     diag(S) * A * diag(S).

PARAMETERS
     THRESH is a threshold value used to decide if scaling should be done
     based on the ratio of the scaling factors.	 If SCOND < THRESH, scaling is
     done.

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

									Page 2

[top]

List of man pages available for IRIX

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net