CROT
November 2006
Purpose
CROT applies a plane rotation, where the cos (C) is real and the
sin (S) is complex, and the vectors CX and CY are complex.
sin (S) is complex, and the vectors CX and CY are complex.
Arguments
| N |
(input) INTEGER
The number of elements in the vectors CX and CY.
|
| CX |
(input/output) COMPLEX 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 CY. INCX <> 0.
|
| CY |
(input/output) COMPLEX array, dimension (N)
On input, the vector Y.
On output, CY is overwritten with -CONJG(S)*X + C*Y. |
| INCY |
(input) INTEGER
The increment between successive values of CY. INCX <> 0.
|
| C |
(input) REAL
|
| S |
(input) COMPLEX
C and S define a rotation
[ C S ] [ -conjg(S) C ] where C*C + S*CONJG(S) = 1.0. |