LAPACK  3.4.0
LAPACK: Linear Algebra PACKage
Functions/Subroutines
crot.f File Reference

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Functions/Subroutines

subroutine CROT (N, CX, INCX, CY, INCY, C, S)
 CROT

Function/Subroutine Documentation

subroutine CROT ( INTEGER  N,
COMPLEX, dimension( * )  CX,
INTEGER  INCX,
COMPLEX, dimension( * )  CY,
INTEGER  INCY,
REAL  C,
COMPLEX  S 
)

CROT

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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:
[in]N
          N is INTEGER
          The number of elements in the vectors CX and CY.
[in,out]CX
          CX is COMPLEX array, dimension (N)
          On input, the vector X.
          On output, CX is overwritten with C*X + S*Y.
[in]INCX
          INCX is INTEGER
          The increment between successive values of CY.  INCX <> 0.
[in,out]CY
          CY is COMPLEX array, dimension (N)
          On input, the vector Y.
          On output, CY is overwritten with -CONJG(S)*X + C*Y.
[in]INCY
          INCY is INTEGER
          The increment between successive values of CY.  INCX <> 0.
[in]C
          C is REAL
[in]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:
November 2011

Definition at line 104 of file crot.f.

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