clange(3) [centos man page]

```clange.f(3)							      LAPACK							       clange.f(3)

NAME
clange.f -

SYNOPSIS
Functions/Subroutines
REAL function clange (NORM, M, N, A, LDA, WORK)
CLANGE returns the value of the 1-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a general
rectangular matrix.

Function/Subroutine Documentation
REAL function clange (characterNORM, integerM, integerN, complex, dimension( lda, * )A, integerLDA, real, dimension( * )WORK)
CLANGE returns the value of the 1-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a general
rectangular matrix.

Purpose:

CLANGE  returns the value of the one norm,	or the Frobenius norm, or
the  infinity norm,  or the  element of  largest absolute value  of a
complex matrix A.

Returns:
CLANGE

CLANGE = ( 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 CLANGE as described
above.

M

M is INTEGER
The number of rows of the matrix A.  M >= 0.  When M = 0,
CLANGE is set to zero.

N

N is INTEGER
The number of columns of the matrix A.  N >= 0.  When N = 0,
CLANGE is set to zero.

A

A is COMPLEX array, dimension (LDA,N)
The m by n matrix A.

LDA

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

WORK

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

Author:
Univ. of Tennessee

Univ. of California Berkeley

NAG Ltd.

Date:
September 2012

Definition at line 116 of file clange.f.

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

Version 3.4.2							  Tue Sep 25 2012						       clange.f(3)```

Check Out this Related Man Page

```CLANGE(l)								 )								 CLANGE(l)

NAME
CLANGE  - return the value of the one norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a com-
plex matrix A

SYNOPSIS
REAL FUNCTION CLANGE( NORM, M, N, A, LDA, WORK )

CHARACTER NORM

INTEGER   LDA, M, N

REAL      WORK( * )

COMPLEX   A( LDA, * )

PURPOSE
CLANGE returns the value of the one norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of  a  com-
plex matrix A.

DESCRIPTION
CLANGE returns the value

CLANGE = ( 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  matrix norm.

ARGUMENTS
NORM    (input) CHARACTER*1
Specifies the value to be returned in CLANGE as described above.

M       (input) INTEGER
The number of rows of the matrix A.  M >= 0.  When M = 0, CLANGE is set to zero.

N       (input) INTEGER
The number of columns of the matrix A.  N >= 0.	When N = 0, CLANGE is set to zero.

A       (input) COMPLEX array, dimension (LDA,N)
The m by n matrix A.

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

WORK    (workspace) REAL array, dimension (LWORK),
where LWORK >= M when NORM = 'I'; otherwise, WORK is not referenced.

LAPACK version 3.0						   15 June 2000 							 CLANGE(l)```
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