CLACRT (3) - Linux Man Pages

clacrt.f -

SYNOPSIS

Functions/Subroutines

subroutine clacrt (N, CX, INCX, CY, INCY, C, S)
CLACRT performs a linear transformation of a pair of complex vectors.

Function/Subroutine Documentation

subroutine clacrt (integerN, complex, dimension( * )CX, integerINCX, complex, dimension( * )CY, integerINCY, complexC, complexS)

CLACRT performs a linear transformation of a pair of complex vectors.

Purpose:

CLACRT 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.

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 CX.  INCX <> 0.

CY

CY is COMPLEX array, dimension (N)
On input, the vector y.
On output, CY is overwritten with -s*x + c*y.

INCY

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

C

C is COMPLEX

S

S is COMPLEX
C and S define the matrix
[  C   S  ].
[ -S   C  ]

Author:

Univ. of Tennessee

Univ. of California Berkeley