CSROT(1)CSROT(1)NAME
CSROT - plane rotation, where the cos and sin (c and s) are real and
the vectors cx and cy are complex
SYNOPSIS
SUBROUTINE CSROT( N, CX, INCX, CY, INCY, C, S )
INTEGER INCX, INCY, N
REAL C, S
COMPLEX CX( * ), CY( * )
PURPOSE
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.
ARGUMENTS
N (input) INTEGER
On entry, N specifies the order of the vectors cx and cy. N
must be at least zero. Unchanged on exit.
CX (input) COMPLEX array, dimension at least
( 1 + ( N - 1 )*abs( INCX ) ). Before entry, the incremented
array CX must contain the n element vector cx. On exit, CX is
overwritten by the updated vector cx.
INCX (input) INTEGER
On entry, INCX specifies the increment for the elements of CX.
INCX must not be zero. Unchanged on exit.
CY (input) COMPLEX array, dimension at least
( 1 + ( N - 1 )*abs( INCY ) ). Before entry, the incremented
array CY must contain the n element vector cy. On exit, CY is
overwritten by the updated vector cy.
INCY (input) INTEGER
On entry, INCY specifies the increment for the elements of CY.
INCY must not be zero. Unchanged on exit.
C (input) REAL
On entry, C specifies the cosine, cos. Unchanged on exit.
S (input) REAL
On entry, S specifies the sine, sin. Unchanged on exit.
October 2006 CSROT(1)
