All Packages  Class Hierarchy  This Package  Previous  Next  Index

Class org.netlib.lapack.Dlange

java.lang.Object
   |
   +----org.netlib.lapack.Dlange

public class Dlange

extends Object

Following is the description from the original
Fortran source.  For each array argument, the Java
version will include an integer offset parameter, so
the arguments may not match the description exactly.
Contact seymour@cs.utk.edu with any questions.

 *     ..
 *
 *  Purpose
 *  =======
 *
 *  DLANGE  returns the value of the one norm,  or the Frobenius norm, or
 *  the  infinity norm,  or the  element of  largest absolute value  of a
 *  real matrix A.
 *
 *  Description
 *  ===========
 *
 *  DLANGE returns the value
 *
 *     DLANGE = ( 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 DLANGE as described
 *          above.
 *
 *  M       (input) INTEGER
 *          The number of rows of the matrix A.  M >= 0.  When M = 0,
 *          DLANGE is set to zero.
 *
 *  N       (input) INTEGER
 *          The number of columns of the matrix A.  N >= 0.  When N = 0,
 *          DLANGE is set to zero.
 *
 *  A       (input) DOUBLE PRECISION 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) DOUBLE PRECISION array, dimension (LWORK),
 *          where LWORK >= M when NORM = 'I'; otherwise, WORK is not
 *          referenced.
 *
 * =====================================================================
 *
 *     .. Parameters ..

Dlange()

dlange(String, int, int, double[], int, int, double[], int)

 public Dlange()

 public static double dlange(String norm,
                             int m,
                             int n,
                             double a[],
                             int _a_offset,
                             int lda,
                             double work[],
                             int _work_offset)

All Packages  Class Hierarchy  This Package  Previous  Next  Index