dlaqge man page on Scientific

Man page or keyword search:  
man Server   26626 pages
apropos Keyword Search (all sections)
Output format
Scientific logo
[printable version]

DLAQGE(1)	    LAPACK auxiliary routine (version 3.2)	     DLAQGE(1)

NAME
       DLAQGE  - equilibrates a general M by N matrix A using the row and col‐
       umn scaling factors in the vectors R and C

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

	   CHARACTER	  EQUED

	   INTEGER	  LDA, M, N

	   DOUBLE	  PRECISION AMAX, COLCND, ROWCND

	   DOUBLE	  PRECISION A( LDA, * ), C( * ), R( * )

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

ARGUMENTS
       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) DOUBLE PRECISION 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.

       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	 post‐
	       multiplied  by diag(C).	= 'B':	Both row and column equilibra‐
	       tion, i.e., A has been replaced by diag(R) * A * diag(C).

PARAMETERS
       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.

 LAPACK auxiliary routine (versioNovember 2008			     DLAQGE(1)
[top]

List of man pages available for Scientific

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