# dscal.f - Man Page

## Synopsis

### Functions/Subroutines

subroutine **dscal** (**N**, DA, DX, INCX)**DSCAL**

## Function/Subroutine Documentation

### subroutine dscal (integer N, double precision DA, double precision, dimension(*) DX, integer INCX)

**DSCAL**

**Purpose:**

DSCAL scales a vector by a constant. uses unrolled loops for increment equal to 1.

**Parameters:***N*N is INTEGER number of elements in input vector(s)

*DA*DA is DOUBLE PRECISION On entry, DA specifies the scalar alpha.

*DX*DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

*INCX*INCX is INTEGER storage spacing between elements of DX

**Author:**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

**Date:**November 2017

**Further Details:**

jack dongarra, linpack, 3/11/78. modified 3/93 to return if incx .le. 0. modified 12/3/93, array(1) declarations changed to array(*)

Definition at line 81 of file dscal.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page dscal(3) is an alias of dscal.f(3).

Tue Nov 14 2017 Version 3.8.0 LAPACK