zlacrt3lapack
Performs the operation ( c s )( x ) ==> ( x ) ( -s c )( y ) ( y ) where c and s are complex and the vectors x and y are complex
Usage
- SUBROUTINE ZLACRT(
-
N, CX, INCX, CY, INCY, C, S )
- INTEGER
-
INCX, INCY, N
- COMPLEX*16
-
C, S
- COMPLEX*16
-
CX( * ), CY( * )
Purpose
ZLACRT performs the operation
Arguments
N (input) INTEGER
|
The number of elements in the vectors CX and CY. |
|---|---|
CX (input/output) COMPLEX*16 array, dimension (N)
|
On input, the vector x. On output, CX is overwritten with c*x + s*y. |
INCX (input) INTEGER
|
The increment between successive values of CX. INCX <> 0. |
CY (input/output) COMPLEX*16 array, dimension (N)
|
On input, the vector y. On output, CY is overwritten with -s*x + c*y. |
INCY (input) INTEGER
|
The increment between successive values of CY. INCY <> 0. |
C (input) COMPLEX*16
|
S (input) COMPLEX*16 C and S define the matrix [ C S ]. [ -S C ] |