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

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

           CA

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

           CX

                     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(*)

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

       Purpose:

               CSSCAL scales a complex vector by a real constant.

       Parameters
           N

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

           SA

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

           CX

                     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(*)

   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.

       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(*)

   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

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

           SA

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

           SX

                     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(*)

   subroutine zdscal (integer n, double precision da, complex*16, dimension(*) zx, integer incx)
       ZDSCAL

       Purpose:

               ZDSCAL scales a vector by a constant.

       Parameters
           N

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

           DA

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

           ZX

                     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(*)

   subroutine zscal (integer n, complex*16 za, complex*16, dimension(*) zx, integer incx)
       ZSCAL

       Purpose:

               ZSCAL scales a vector by a constant.

       Parameters
           N

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

           ZA

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

           ZX

                     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(*)

Author

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