NAME

csrot - Apply a plane rotation

SYNOPSIS

SUBROUTINE CSROT (N, X, INCY, Y, INCY, C, S)

INTEGER      INCX, INCY, N

REAL         C, S

COMPLEX      X( ∗ ), Y( ∗ )

#include <sunperf.h>

void csrot(int ∗n, complex ∗cx, int ∗incx, complex ∗cy, int ∗incy, float ∗c, float ∗s) ;

PURPOSE

CSROT - Apply a plane rotation, where the cos and sin (c and s) are real and the vectors x and y are complex. 
 

PARAMETERS

N - INTEGER. 
On entry, N specifies the number of elements in the vector.  N must be at least one for the subroutine to have any visible effect.  Unchanged on exit.

X - COMPLEX array of DIMENSION at least
( 1 + ( n - 1 )∗abs( INCX ) ). Before entry, the incremented array X must contain the vector x. Unchanged on exit.

INCX - INTEGER. 
On entry, INCX specifies the increment for the elements of X. INCX must not be zero. Unchanged on exit.

Y - COMPLEX array of DIMENSION at least
( 1 + ( m - 1 )∗abs( INCY ) ). On entry, the incremented array Y must contain the vector y. On exit, Y is overwritten by the updated vector y.

INCY - INTEGER. 
On entry, INCY specifies the increment for the elements of Y. INCY must not be zero. Unchanged on exit.

C, S   - REAL On entry, the cos and sin. 

SunOS 5.0  —  Last change: 10 Dec 1998