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

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
NAG Ltd.
Date:
September 2012
Definition at line 106 of file zlacrt.f.

# Author

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