NAME

dscal - Compute y := alpha ∗ y

SYNOPSIS

SUBROUTINE DSCAL (N, ALPHA, Y, INCY )

void dscal(long int n, double da, double ∗dx,
long int incx)

DOUBLE PRECISION    ALPHA

INTEGER INCY, N

DOUBLE PRECISION    Y( ∗ )

PURPOSE

DSCAL - Compute y := alpha ∗ y where alpha is a scalar and y is an n-vector. 
 

PARAMETERS

N      - INTEGER. 
On entry, N specifies the number of elements in the vector.  N must be at least one for the subroutine to have any visible effect.  Unchanged on exit.

ALPHA  - DOUBLE PRECISION. 
On entry, ALPHA specifies the scalar alpha. Unchanged on exit.

Y      - DOUBLE PRECISION array of DIMENSION at least
( 1 + ( m - 1 )∗abs( INCY ) ). On entry, the incremented array Y must contain the vector y. On exit, Y is overwritten by the updated vector y.

INCY   - INTEGER. 
On entry, INCY specifies the increment for the elements of Y. INCY must not be zero. Unchanged on exit.

Sun, Inc.  —  Last change: 20 Sep 1996