zdrot Subroutine

public subroutine zdrot(n, zx, incx, zy, incy, c, s)

NAME

zdrot(3f) - [BLAS:COMPLEX16_BLAS_LEVEL1]

SYNOPSIS

 subroutine zdrot( n, zx, incx, zy, incy, c, s )

   .. Scalar Arguments ..
   integer,intent(in)          :: incx, incy, n
   double precision,intent(in) :: c, s
   ..
   .. Array Arguments ..
   complex(kind=real64),intent(inout) :: zx( * ), zy( * )
   ..

DEFINITION

Applies a plane rotation, where the cos and sin (c and s) are real and the vectors cx and cy are complex. jack dongarra, linpack, 3/11/78.

OPTIONS

N

       N is INTEGER
        On entry, N specifies the order of the vectors cx and cy.
        N must be at least zero.

ZX

       ZX is complex(kind=real64) array, dimension at least
        ( 1 + ( N - 1 )*abs( INCX ) ).
        Before entry, the incremented array ZX must contain the n
        element vector cx. On exit, ZX is overwritten by the updated
        vector cx.

INCX

       INCX is INTEGER
        On entry, INCX specifies the increment for the elements of
        ZX. INCX must not be zero.

ZY

       ZY is complex(kind=real64) array, dimension at least
        ( 1 + ( N - 1 )*abs( INCY ) ).
        Before entry, the incremented array ZY must contain the n
        element vector cy. On exit, ZY is overwritten by the updated
        vector cy.

INCY

       INCY is INTEGER
        On entry, INCY specifies the increment for the elements of
        ZY. INCY must not be zero.

C

       C is DOUBLE PRECISION
        On entry, C specifies the cosine, cos.

S

       S is DOUBLE PRECISION
        On entry, S specifies the sine, sin.

AUTHORS

  • Univ. of Tennessee
  • Univ. of California Berkeley
  • Univ. of Colorado Denver
  • NAG Ltd.

date:December 2016

SEE ALSO

Online html documentation available at
http://www.netlib.org/lapack/explore-html/

Arguments

Type IntentOptional Attributes Name
integer, intent(in) :: n
complex(kind=real64), intent(inout) :: zx(*)
integer, intent(in) :: incx
complex(kind=real64), intent(inout) :: zy(*)
integer, intent(in) :: incy
double precision, intent(in) :: c
double precision, intent(in) :: s

Contents

Variables


Variables

Type Visibility Attributes Name Initial
complex(kind=real64), public :: ctemp
integer, public :: i
integer, public :: ix
integer, public :: iy