Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages

CentOS 7.0 - man page for zlantr (centos section 3)

zlantr.f(3)				      LAPACK				      zlantr.f(3)

NAME
       zlantr.f -

SYNOPSIS
   Functions/Subroutines
       DOUBLE PRECISION function zlantr (NORM, UPLO, DIAG, M, N, A, LDA, WORK)
	   ZLANTR returns the value of the 1-norm, or the Frobenius norm, or the infinity norm,
	   or the element of largest absolute value of a trapezoidal or triangular matrix.

Function/Subroutine Documentation
   DOUBLE PRECISION function zlantr (characterNORM, characterUPLO, characterDIAG, integerM,
       integerN, complex*16, dimension( lda, * )A, integerLDA, double precision, dimension( *
       )WORK)
       ZLANTR returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or
       the element of largest absolute value of a trapezoidal or triangular matrix.

       Purpose:

	    ZLANTR  returns the value of the one norm,	or the Frobenius norm, or
	    the  infinity norm,  or the  element of  largest absolute value  of a
	    trapezoidal or triangular matrix A.

       Returns:
	   ZLANTR

	       ZLANTR = ( max(abs(A(i,j))), NORM = 'M' or 'm'
			(
			( norm1(A),	    NORM = '1', 'O' or 'o'
			(
			( normI(A),	    NORM = 'I' or 'i'
			(
			( normF(A),	    NORM = 'F', 'f', 'E' or 'e'

	    where  norm1  denotes the  one norm of a matrix (maximum column sum),
	    normI  denotes the	infinity norm  of a matrix  (maximum row sum) and
	    normF  denotes the	Frobenius norm of a matrix (square root of sum of
	    squares).  Note that  max(abs(A(i,j)))  is not a consistent matrix norm.

       Parameters:
	   NORM

		     NORM is CHARACTER*1
		     Specifies the value to be returned in ZLANTR as described
		     above.

	   UPLO

		     UPLO is CHARACTER*1
		     Specifies whether the matrix A is upper or lower trapezoidal.
		     = 'U':  Upper trapezoidal
		     = 'L':  Lower trapezoidal
		     Note that A is triangular instead of trapezoidal if M = N.

	   DIAG

		     DIAG is CHARACTER*1
		     Specifies whether or not the matrix A has unit diagonal.
		     = 'N':  Non-unit diagonal
		     = 'U':  Unit diagonal

	   M

		     M is INTEGER
		     The number of rows of the matrix A.  M >= 0, and if
		     UPLO = 'U', M <= N.  When M = 0, ZLANTR is set to zero.

	   N

		     N is INTEGER
		     The number of columns of the matrix A.  N >= 0, and if
		     UPLO = 'L', N <= M.  When N = 0, ZLANTR is set to zero.

	   A

		     A is COMPLEX*16 array, dimension (LDA,N)
		     The trapezoidal matrix A (A is triangular if M = N).
		     If UPLO = 'U', the leading m by n upper trapezoidal part of
		     the array A contains the upper trapezoidal matrix, and the
		     strictly lower triangular part of A is not referenced.
		     If UPLO = 'L', the leading m by n lower trapezoidal part of
		     the array A contains the lower trapezoidal matrix, and the
		     strictly upper triangular part of A is not referenced.  Note
		     that when DIAG = 'U', the diagonal elements of A are not
		     referenced and are assumed to be one.

	   LDA

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

	   WORK

		     WORK is DOUBLE PRECISION array, dimension (MAX(1,LWORK)),
		     where LWORK >= M when NORM = 'I'; otherwise, WORK is not
		     referenced.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 142 of file zlantr.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2				 Tue Sep 25 2012			      zlantr.f(3)


All times are GMT -4. The time now is 05:45 AM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
UNIX.COM Login
Username:
Password:  
Show Password