org.netlib.lapack
Class Slantp

java.lang.Object
  org.netlib.lapack.Slantp

public class Slantp
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
 *  =======
 *
 *  SLANTP  returns the value of the one norm,  or the Frobenius norm, or
 *  the  infinity norm,  or the  element of  largest absolute value  of a
 *  triangular matrix A, supplied in packed form.
 *
 *  Description
 *  ===========
 *
 *  SLANTP returns the value
 *
 *     SLANTP = ( 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 SLANTP as described
 *          above.
 *
 *  UPLO    (input) CHARACTER*1
 *          Specifies whether the matrix A is upper or lower triangular.

 *          = 'U':  Upper triangular
 *          = 'L':  Lower triangular
 *
 *  DIAG    (input) CHARACTER*1
 *          Specifies whether or not the matrix A is unit triangular.
 *          = 'N':  Non-unit triangular
 *          = 'U':  Unit triangular
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.  N >= 0.  When N = 0, SLANTP is
 *          set to zero.
 *
 *  AP      (input) REAL array, dimension (N*(N+1)/2)
 *          The upper or lower triangular matrix A, packed columnwise in

 *          a linear array.  The j-th column of A is stored in the array

 *          AP as follows:
 *          if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
 *          if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.
 *          Note that when DIAG = 'U', the elements of the array AP
 *          corresponding to the diagonal elements of the matrix A are
 *          not referenced, but are assumed to be one.
 *
 *  WORK    (workspace) REAL array, dimension (LWORK),
 *          where LWORK >= N when NORM = 'I'; otherwise, WORK is not
 *          referenced.
 *
 * =====================================================================

 *
 *     .. Parameters ..

Constructor Summary

Slantp()

Method Summary

static float

slantp(java.lang.String norm, java.lang.String uplo, java.lang.String diag, int n, float[] ap, int _ap_offset, float[] work, int _work_offset)

Methods inherited from class java.lang.Object

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

Constructor Detail

Slantp

public Slantp()

Method Detail

slantp

public static float slantp(java.lang.String norm,
                           java.lang.String uplo,
                           java.lang.String diag,
                           int n,
                           float[] ap,
                           int _ap_offset,
                           float[] work,
                           int _work_offset)