All Packages  Class Hierarchy  This Package  Previous  Next  Index

Class org.netlib.blas.Dger

java.lang.Object
   |
   +----org.netlib.blas.Dger

public class Dger

extends 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
 *  =======
 *
 *  DGER   performs the rank 1 operation
 *
 *     A := alpha*x*y' + A,
 *
 *  where alpha is a scalar, x is an m element vector, y is an n element
 *  vector and A is an m by n matrix.
 *
 *  Parameters
 *  ==========
 *
 *  M      - INTEGER.
 *           On entry, M specifies the number of rows of the matrix A.
 *           M must be at least zero.
 *           Unchanged on exit.
 *
 *  N      - INTEGER.
 *           On entry, N specifies the number of columns of the matrix A.
 *           N must be at least zero.
 *           Unchanged on exit.
 *
 *  ALPHA  - DOUBLE PRECISION.
 *           On entry, ALPHA specifies the scalar alpha.
 *           Unchanged on exit.
 *
 *  X      - DOUBLE PRECISION array of dimension at least
 *           ( 1 + ( m - 1 )*abs( INCX ) ).
 *           Before entry, the incremented array X must contain the m
 *           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.
 *
 *  Y      - DOUBLE PRECISION array of dimension at least
 *           ( 1 + ( n - 1 )*abs( INCY ) ).
 *           Before entry, the incremented array Y must contain the n
 *           element vector y.
 *           Unchanged on exit.
 *
 *  INCY   - INTEGER.
 *           On entry, INCY specifies the increment for the elements of
 *           Y. INCY must not be zero.
 *           Unchanged on exit.
 *
 *  A      - DOUBLE PRECISION array of DIMENSION ( LDA, n ).
 *           Before entry, the leading m by n part of the array A must
 *           contain the matrix of coefficients. On exit, A is
 *           overwritten by 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, m ).
 *           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 ..

Dger()

dger(int, int, double, double[], int, int, double[], int, int, double[], int, int)

 public Dger()

 public static void dger(int m,
                         int n,
                         double alpha,
                         double x[],
                         int _x_offset,
                         int incx,
                         double y[],
                         int _y_offset,
                         int incy,
                         double a[],
                         int _a_offset,
                         int lda)

All Packages  Class Hierarchy  This Package  Previous  Next  Index