crot.f man page

crot.f —

Synopsis

Functions/Subroutines

subroutine crot (N, CX, INCX, CY, INCY, C, S)
CROT applies a plane rotation with real cosine and complex sine to a pair of complex vectors.

Function/Subroutine Documentation

subroutine crot (integerN, complex, dimension( * )CX, integerINCX, complex, dimension( * )CY, integerINCY, realC, complexS)

CROT applies a plane rotation with real cosine and complex sine to a pair of complex vectors.

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.

Parameters:

N

N is INTEGER
The number of elements in the vectors CX and CY.

CX

CX is COMPLEX array, dimension (N)
On input, the vector X.
On output, CX is overwritten with C*X + S*Y.

INCX

INCX is INTEGER
The increment between successive values of CY.  INCX <> 0.

CY

CY is COMPLEX array, dimension (N)
On input, the vector Y.
On output, CY is overwritten with -CONJG(S)*X + C*Y.

INCY

INCY is INTEGER
The increment between successive values of CY.  INCX <> 0.

C

C is REAL

S

S is COMPLEX
C and S define a rotation
   [  C          S  ]
   [ -conjg(S)   C  ]
where C*C + S*CONJG(S) = 1.0.

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

September 2012

Definition at line 104 of file crot.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Referenced By

crot(3) is an alias of crot.f(3).

Sat Nov 16 2013 Version 3.4.2 LAPACK