org.netlib.blas
Class Ssyr

java.lang.Object
  org.netlib.blas.Ssyr

public class Ssyr
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
 *  =======
 *
 *  SSYR   performs the symmetric rank 1 operation
 *
 *     A := alpha*x*x' + A,
 *
 *  where alpha is a real scalar, x is an n element vector and A is an
 *  n by n symmetric matrix.
 *
 *  Parameters
 *  ==========
 *
 *  UPLO   - CHARACTER*1.
 *           On entry, UPLO specifies whether the upper or lower
 *           triangular part of the array A is to be referenced as
 *           follows:
 *
 *              UPLO = 'U' or 'u'   Only the upper triangular part of A
 *                                  is to be referenced.
 *
 *              UPLO = 'L' or 'l'   Only the lower triangular part of A
 *                                  is to be referenced.
 *
 *           Unchanged on exit.
 *
 *  N      - INTEGER.
 *           On entry, N specifies the order of the matrix A.
 *           N must be at least zero.
 *           Unchanged on exit.
 *
 *  ALPHA  - REAL            .
 *           On entry, ALPHA specifies the scalar alpha.
 *           Unchanged on exit.
 *
 *  X      - REAL             array of dimension at least
 *           ( 1 + ( n - 1 )*abs( INCX ) ).
 *           Before entry, the incremented array X must contain the n
 *           element vector x.
 *           Unchanged on exit.
 *
 *  INCX   - INTEGER.
 *           On entry, INCX specifies the increment for the elements of
 *           X. INCX must not be zero.
 *           Unchanged on exit.
 *
 *  A      - REAL             array of DIMENSION ( LDA, n ).
 *           Before entry with  UPLO = 'U' or 'u', the leading n by n
 *           upper triangular part of the array A must contain the upper

 *           triangular part of the symmetric matrix and the strictly
 *           lower triangular part of A is not referenced. On exit, the
 *           upper triangular part of the array A is overwritten by the
 *           upper triangular part of the updated matrix.
 *           Before entry with UPLO = 'L' or 'l', the leading n by n
 *           lower triangular part of the array A must contain the lower

 *           triangular part of the symmetric matrix and the strictly
 *           upper triangular part of A is not referenced. On exit, the
 *           lower triangular part of the array A is overwritten by the
 *           lower triangular part of the updated matrix.
 *
 *  LDA    - INTEGER.
 *           On entry, LDA specifies the first dimension of A as declared
 *           in the calling (sub) program. LDA must be at least
 *           max( 1, n ).
 *           Unchanged on exit.
 *
 *
 *  Level 2 Blas routine.
 *
 *  -- Written on 22-October-1986.
 *     Jack Dongarra, Argonne National Lab.
 *     Jeremy Du Croz, Nag Central Office.
 *     Sven Hammarling, Nag Central Office.
 *     Richard Hanson, Sandia National Labs.
 *
 *
 *     .. Parameters ..

Constructor Summary

Ssyr()

Method Summary

static void

ssyr(java.lang.String uplo, int n, float alpha, float[] x, int _x_offset, int incx, float[] a, int _a_offset, int lda)

Methods inherited from class java.lang.Object

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

Constructor Detail

Ssyr

public Ssyr()

Method Detail

ssyr

public static void ssyr(java.lang.String uplo,
                        int n,
                        float alpha,
                        float[] x,
                        int _x_offset,
                        int incx,
                        float[] a,
                        int _a_offset,
                        int lda)