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Class org.netlib.lapack.DLANGE

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

public class DLANGE

extends Object

DLANGE is a simplified interface to the JLAPACK routine dlange.
This interface converts Java-style 2D row-major arrays into
the 1D column-major linearized arrays expected by the lower
level JLAPACK routines.  Using this interface also allows you
to omit offset and leading dimension arguments.  However, because
of these conversions, these routines will be slower than the low
level ones.  Following is the description from the original Fortran
source.  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[][], double[])

 public DLANGE()

 public static double DLANGE(String norm,
                             int m,
                             int n,
                             double a[][],
                             double work[])

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