Man page - lacrt(3)

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Manual

lacrt

NAME
SYNOPSIS
Functions
Detailed Description
Function Documentation
subroutine clacrt (integer n, complex, dimension( * ) cx, integer incx,complex, dimension( * ) cy, integer incy, complex c, complex s)
subroutine zlacrt (integer n, complex*16, dimension( * ) cx, integer incx,complex*16, dimension( * ) cy, integer incy, complex*16 c, complex*16s)
Author

NAME

lacrt - lacrt: apply plane rotation (unused?)

SYNOPSIS

Functions

subroutine clacrt (n, cx, incx, cy, incy, c, s)
CLACRT performs a linear transformation of a pair of complex vectors.
subroutine zlacrt (n, cx, incx, cy, incy, c, s)
ZLACRT performs a linear transformation of a pair of complex vectors.

Detailed Description

Function Documentation

subroutine clacrt (integer n, complex, dimension( * ) cx, integer incx,complex, dimension( * ) cy, integer incy, complex c, complex s)

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

Univ. of Colorado Denver

NAG Ltd.

subroutine zlacrt (integer n, complex*16, dimension( * ) cx, integer incx,complex*16, dimension( * ) cy, integer incy, complex*16 c, 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.

Author

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