scal(3)

Library Functions Manual

scal(3)

NAME

scal - scal: x = alpha x

SYNOPSIS

Functions

subroutine cscal (n, ca, cx, incx)
CSCAL subroutine csscal (n, sa, cx, incx)
CSSCAL subroutine dscal (n, da, dx, incx)
DSCAL subroutine sscal (n, sa, sx, incx)
SSCAL subroutine zdscal (n, da, zx, incx)
ZDSCAL subroutine zscal (n, za, zx, incx)
ZSCAL

Detailed Description

Function Documentation

subroutine cscal (integer n, complex ca, complex, dimension(*) cx, integer incx)

CSCAL

Purpose:

    CSCAL scales a vector by a constant.

Parameters

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

          CA is COMPLEX
           On entry, CA specifies the scalar alpha.

          CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX

          INCX is INTEGER
         storage spacing between elements of CX

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

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 77 of file cscal.f.

subroutine csscal (integer n, real sa, complex, dimension(*) cx, integer incx)

CSSCAL

Purpose:

    CSSCAL scales a complex vector by a real constant.

Parameters

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

          SA is REAL
           On entry, SA specifies the scalar alpha.

          CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX

          INCX is INTEGER
         storage spacing between elements of CX

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

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 77 of file csscal.f.

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 is INTEGER
         number of elements in input vector(s)

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

          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.

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 78 of file dscal.f.

subroutine sscal (integer n, real sa, real, dimension(*) sx, integer incx)

SSCAL

Purpose:

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

Parameters

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

          SA is REAL
           On entry, SA specifies the scalar alpha.

          SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX

          INCX is INTEGER
         storage spacing between elements of SX

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

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 78 of file sscal.f.

subroutine zdscal (integer n, double precision da, complex16, dimension() zx, integer incx)

ZDSCAL

Purpose:

    ZDSCAL scales a vector by a constant.

Parameters

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

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

          ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX

          INCX is INTEGER
         storage spacing between elements of ZX

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:

     jack dongarra, 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 77 of file zdscal.f.

subroutine zscal (integer n, complex16 za, complex16, dimension(*) zx, integer incx)

ZSCAL

Purpose:

    ZSCAL scales a vector by a constant.

Parameters

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

          ZA is COMPLEX*16
           On entry, ZA specifies the scalar alpha.

          ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX

          INCX is INTEGER
         storage spacing between elements of ZX

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:

     jack dongarra, 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 77 of file zscal.f.

Author

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