2. EL 7
  3. lapack
  4. DLARTV(3)

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dlartv.f(3) LAPACK dlartv.f(3)

NAME

dlartv.f -

SYNOPSIS

Functions/Subroutines


subroutine dlartv (N, X, INCX, Y, INCY, C, S, INCC)
DLARTV applies a vector of plane rotations with real cosines and real sines to the elements of a pair of vectors.

Function/Subroutine Documentation

subroutine dlartv (integerN, double precision, dimension( * )X, integerINCX, double precision, dimension( * )Y, integerINCY, double precision, dimension( * )C, double precision, dimension( * )S, integerINCC)

DLARTV applies a vector of plane rotations with real cosines and real sines to the elements of a pair of vectors.

Purpose: 



 DLARTV applies a vector of real plane rotations to elements of the


 real vectors x and y. For i = 1,2,...,n


    ( x(i) ) := (  c(i)  s(i) ) ( x(i) )


    ( y(i) )    ( -s(i)  c(i) ) ( y(i) )

Parameters:

N 



          N is INTEGER


          The number of plane rotations to be applied.

X



          X is DOUBLE PRECISION array,


                         dimension (1+(N-1)*INCX)


          The vector x.

INCX



          INCX is INTEGER


          The increment between elements of X. INCX > 0.

Y



          Y is DOUBLE PRECISION array,


                         dimension (1+(N-1)*INCY)


          The vector y.

INCY



          INCY is INTEGER


          The increment between elements of Y. INCY > 0.

C



          C is DOUBLE PRECISION array, dimension (1+(N-1)*INCC)


          The cosines of the plane rotations.

S



          S is DOUBLE PRECISION array, dimension (1+(N-1)*INCC)


          The sines of the plane rotations.

INCC



          INCC is INTEGER


          The increment between elements of C and S. INCC > 0.

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

September 2012

Definition at line 109 of file dlartv.f.

Author

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Tue Sep 25 2012 Version 3.4.2