?lacrt

Performs a linear transformation of a pair of complex vectors.

Syntax

call clacrt( n, cx, incx, cy, incy, c, s )

call zlacrt( n, cx, incx, cy, incy, c, s )

Include Files

The FORTRAN 77 interfaces are specified in the mkl_lapack.fi include file (to be used in Fortran programs) and in the mkl_lapack.h include file (to be used in C programs).

Description

The routine performs the following transformation

where c, s are complex scalars and x, y are complex vectors.

Input Parameters

n

INTEGER. The number of elements in the vectors cx and cy (n ≥ 0).

cx, cy

COMPLEX for clacrt

DOUBLE COMPLEX for zlacrt

Arrays, dimension (n).

Contain input vectors x and y, respectively.

incx

INTEGER. The increment between successive elements of cx.

incy

INTEGER. The increment between successive elements of cy.

c, s

COMPLEX for clacrt

DOUBLE COMPLEX for zlacrt

Complex scalars that define the transform matrix

Output Parameters

cx: On exit, overwritten with c*x + s*y .
cy: On exit, overwritten with -s*x + c*y .