org.netlib.lapack
Class SLANGT

java.lang.Object
  org.netlib.lapack.SLANGT

public class SLANGT
extends java.lang.Object

SLANGT is a simplified interface to the JLAPACK routine slangt.
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
 *  =======
 *
 *  SLANGT  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 tridiagonal matrix A.
 *
 *  Description
 *  ===========
 *
 *  SLANGT returns the value
 *
 *     SLANGT = ( 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 SLANGT as described
 *          above.
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.  N >= 0.  When N = 0, SLANGT is
 *          set to zero.
 *
 *  DL      (input) REAL array, dimension (N-1)
 *          The (n-1) sub-diagonal elements of A.
 *
 *  D       (input) REAL array, dimension (N)
 *          The diagonal elements of A.
 *
 *  DU      (input) REAL array, dimension (N-1)
 *          The (n-1) super-diagonal elements of A.
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

SLANGT()

Method Summary

static float

SLANGT(java.lang.String norm, int n, float[] dl, float[] d, float[] du)

Methods inherited from class java.lang.Object

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

Constructor Detail

SLANGT

public SLANGT()

Method Detail

SLANGT

public static float SLANGT(java.lang.String norm,
                           int n,
                           float[] dl,
                           float[] d,
                           float[] du)