SRC/clange.f(3)            Library Functions Manual            SRC/clange.f(3)

NAME
       SRC/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 (character norm, integer m, integer n, complex,
       dimension( lda, * ) a, integer lda, 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

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 114 of file clange.f.

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

LAPACK                          Version 3.12.0                 SRC/clange.f(3)