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<title>SuperLU: SRC/slangs.c File Reference</title>
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    SRC/slangs.c File Reference

    Returns the value of the one norm. More...
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    #include <math.h>
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    #include "slu_sdefs.h"
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    Functions

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    float slangs (char *norm, SuperMatrix *A)
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    Detailed Description

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     -- SuperLU routine (version 2.0) --
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     Univ. of California Berkeley, Xerox Palo Alto Research Center,
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     and Lawrence Berkeley National Lab.
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     November 15, 1997

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     Modified from lapack routine SLANGE 
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    Function Documentation

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              float slangs           
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              (
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              char * 
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               norm, 
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              SuperMatrix
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               A 
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              )
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     Purpose   
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       =======

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

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       Description   
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       ===========

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       SLANGE returns the value

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

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

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       Arguments   
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       =========

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       NORM    (input) CHARACTER*1   
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               Specifies the value to be returned in SLANGE as described above.   
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       A       (input) SuperMatrix*
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               The M by N sparse matrix A.

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      =====================================================================
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    <address style="text-align: right;"><small>Generated on Mon Nov 22 10:23:48 2010 for SuperLU by </small></address>
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