org.netlib.lapack
Class Dlansb

java.lang.Object
  org.netlib.lapack.Dlansb

public class Dlansb
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
 *  =======
 *
 *  DLANSB  returns the value of the one norm,  or the Frobenius norm, or
 *  the  infinity norm,  or the element of  largest absolute value  of an
 *  n by n symmetric band matrix A,  with k super-diagonals.
 *
 *  Description
 *  ===========
 *
 *  DLANSB returns the value
 *
 *     DLANSB = ( 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 DLANSB as described
 *          above.
 *
 *  UPLO    (input) CHARACTER*1
 *          Specifies whether the upper or lower triangular part of the
 *          band matrix A is supplied.
 *          = 'U':  Upper triangular part is supplied
 *          = 'L':  Lower triangular part is supplied
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.  N >= 0.  When N = 0, DLANSB is
 *          set to zero.
 *
 *  K       (input) INTEGER
 *          The number of super-diagonals or sub-diagonals of the
 *          band matrix A.  K >= 0.
 *
 *  AB      (input) DOUBLE PRECISION array, dimension (LDAB,N)
 *          The upper or lower triangle of the symmetric band matrix A,
 *          stored in the first K+1 rows of AB.  The j-th column of A is

 *          stored in the j-th column of the array AB as follows:
 *          if UPLO = 'U', AB(k+1+i-j,j) = A(i,j) for max(1,j-k)<=i<=j;
 *          if UPLO = 'L', AB(1+i-j,j)   = A(i,j) for j<=i<=min(n,j+k).
 *
 *  LDAB    (input) INTEGER
 *          The leading dimension of the array AB.  LDAB >= K+1.
 *
 *  WORK    (workspace) DOUBLE PRECISION array, dimension (LWORK),
 *          where LWORK >= N when NORM = 'I' or '1' or 'O'; otherwise,
 *          WORK is not referenced.
 *
 * =====================================================================

 *
 *     .. Parameters ..

Constructor Summary

Dlansb()

Method Summary

static double

dlansb(java.lang.String norm, java.lang.String uplo, int n, int k, double[] ab, int _ab_offset, int ldab, 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

Dlansb

public Dlansb()

Method Detail

dlansb

public static double dlansb(java.lang.String norm,
                            java.lang.String uplo,
                            int n,
                            int k,
                            double[] ab,
                            int _ab_offset,
                            int ldab,
                            double[] work,
                            int _work_offset)