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zlacrt.f(3) LAPACK zlacrt.f(3)

NAME

zlacrt.f -

SYNOPSIS

Functions/Subroutines


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

Function/Subroutine Documentation

subroutine zlacrt (integerN, complex*16, dimension( * )CX, integerINCX, complex*16, dimension( * )CY, integerINCY, complex*16C, complex*16S)

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

Purpose:


ZLACRT 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*16 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*16 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*16

S


S is COMPLEX*16
C and S define the matrix
[ C S ].
[ -S C ]

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

September 2012

Definition at line 106 of file zlacrt.f.

Author

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Tue Sep 25 2012 Version 3.4.2