# zlacrt.f man page

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 (integer N, complex*16, dimension( * ) CX, integer INCX, complex*16, dimension( * ) CY, integer INCY, complex*16 C, complex*16 S)

**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:**December 2016

Definition at line 107 of file zlacrt.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page zlacrt(3) is an alias of zlacrt.f(3).

Tue Nov 14 2017 Version 3.8.0 LAPACK