org.netlib.lapack
Class Dlantr

java.lang.Object
  org.netlib.lapack.Dlantr

public class Dlantr
extends java.lang.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
 *  =======
 *
 *  DLANTR  returns the value of the one norm,  or the Frobenius norm, or
 *  the  infinity norm,  or the  element of  largest absolute value  of a
 *  trapezoidal or triangular matrix A.
 *
 *  Description
 *  ===========
 *
 *  DLANTR returns the value
 *
 *     DLANTR = ( 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 DLANTR as described
 *          above.
 *
 *  UPLO    (input) CHARACTER*1
 *          Specifies whether the matrix A is upper or lower trapezoidal.
 *          = 'U':  Upper trapezoidal
 *          = 'L':  Lower trapezoidal
 *          Note that A is triangular instead of trapezoidal if M = N.
 *
 *  DIAG    (input) CHARACTER*1
 *          Specifies whether or not the matrix A has unit diagonal.
 *          = 'N':  Non-unit diagonal
 *          = 'U':  Unit diagonal
 *
 *  M       (input) INTEGER
 *          The number of rows of the matrix A.  M >= 0, and if
 *          UPLO = 'U', M <= N.  When M = 0, DLANTR is set to zero.
 *
 *  N       (input) INTEGER
 *          The number of columns of the matrix A.  N >= 0, and if
 *          UPLO = 'L', N <= M.  When N = 0, DLANTR is set to zero.
 *
 *  A       (input) DOUBLE PRECISION array, dimension (LDA,N)
 *          The trapezoidal matrix A (A is triangular if M = N).
 *          If UPLO = 'U', the leading m by n upper trapezoidal part of
 *          the array A contains the upper trapezoidal matrix, and the
 *          strictly lower triangular part of A is not referenced.
 *          If UPLO = 'L', the leading m by n lower trapezoidal part of
 *          the array A contains the lower trapezoidal matrix, and the
 *          strictly upper triangular part of A is not referenced.  Note

 *          that when DIAG = 'U', the diagonal elements of A are not
 *          referenced and are assumed to be one.
 *
 *  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 ..

Constructor Summary

Dlantr()

Method Summary

static double

dlantr(java.lang.String norm, java.lang.String uplo, java.lang.String diag, int m, int n, double[] a, int _a_offset, int lda, double[] work, int _work_offset)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Dlantr

public Dlantr()

Method Detail

dlantr

public static double dlantr(java.lang.String norm,
                            java.lang.String uplo,
                            java.lang.String diag,
                            int m,
                            int n,
                            double[] a,
                            int _a_offset,
                            int lda,
                            double[] work,
                            int _work_offset)