dger.f(3) LAPACK dger.f(3)
subroutine dger (M, N, ALPHA, X, INCX, Y, INCY, A, LDA)
subroutine dger (integerM, integerN, double precisionALPHA, double precision, dimension(*)X,
integerINCX, double precision, dimension(*)Y, integerINCY, double precision,
DGER performs the rank 1 operation
A := alpha*x*y**T + 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.
M is INTEGER
On entry, M specifies the number of rows of the matrix A.
M must be at least zero.
N is INTEGER
On entry, N specifies the number of columns of the matrix A.
N must be at least zero.
ALPHA is DOUBLE PRECISION.
On entry, ALPHA specifies the scalar alpha.
X is 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.
INCX is INTEGER
On entry, INCX specifies the increment for the elements of
X. INCX must not be zero.
Y is 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.
INCY is INTEGER
On entry, INCY specifies the increment for the elements of
Y. INCY must not be zero.
A is 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 is 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 ).
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
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.
Definition at line 131 of file dger.f.
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Version 3.4.2 Tue Sep 25 2012 dger.f(3)