org.netlib.lapack
Class Slaqsy

java.lang.Object
  org.netlib.lapack.Slaqsy

public class Slaqsy
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
 *  =======
 *
 *  SLAQSY equilibrates a symmetric matrix A using the scaling factors
 *  in the vector S.
 *
 *  Arguments
 *  =========
 *
 *  UPLO    (input) CHARACTER*1
 *          Specifies whether the upper or lower triangular part of the
 *          symmetric matrix A is stored.
 *          = 'U':  Upper triangular
 *          = 'L':  Lower triangular
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.  N >= 0.
 *
 *  A       (input/output) REAL array, dimension (LDA,N)
 *          On entry, the symmetric matrix A.  If UPLO = 'U', the leading
 *          n by n upper triangular part of A contains the upper
 *          triangular part of the matrix A, and the strictly lower
 *          triangular part of A is not referenced.  If UPLO = 'L', the
 *          leading n by n lower triangular part of A contains the lower

 *          triangular part of the matrix A, and the strictly upper
 *          triangular part of A is not referenced.
 *
 *          On exit, if EQUED = 'Y', the equilibrated matrix:
 *          diag(S) * A * diag(S).
 *
 *  LDA     (input) INTEGER
 *          The leading dimension of the array A.  LDA >= max(N,1).
 *
 *  S       (input) REAL array, dimension (N)
 *          The scale factors for A.
 *
 *  SCOND   (input) REAL
 *          Ratio of the smallest S(i) to the largest S(i).
 *
 *  AMAX    (input) REAL
 *          Absolute value of largest matrix entry.
 *
 *  EQUED   (output) CHARACTER*1
 *          Specifies whether or not equilibration was done.
 *          = 'N':  No equilibration.
 *          = 'Y':  Equilibration was done, i.e., A has been replaced by

 *                  diag(S) * A * diag(S).
 *
 *  Internal Parameters
 *  ===================
 *
 *  THRESH is a threshold value used to decide if scaling should be done

 *  based on the ratio of the scaling factors.  If SCOND < THRESH,
 *  scaling is done.
 *
 *  LARGE and SMALL are threshold values used to decide if scaling should
 *  be done based on the absolute size of the largest matrix element.
 *  If AMAX > LARGE or AMAX < SMALL, scaling is done.
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

Slaqsy()

Method Summary

static void

slaqsy(java.lang.String uplo, int n, float[] a, int _a_offset, int lda, float[] s, int _s_offset, float scond, float amax, StringW equed)

Methods inherited from class java.lang.Object

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

Constructor Detail

Slaqsy

public Slaqsy()

Method Detail

slaqsy

public static void slaqsy(java.lang.String uplo,
                          int n,
                          float[] a,
                          int _a_offset,
                          int lda,
                          float[] s,
                          int _s_offset,
                          float scond,
                          float amax,
                          StringW equed)