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  4. dlargv.f(3)

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dlargv.f(3) LAPACK dlargv.f(3)

NAME

dlargv.f -

SYNOPSIS

Functions/Subroutines


subroutine dlargv (N, X, INCX, Y, INCY, C, INCC)
DLARGV generates a vector of plane rotations with real cosines and real sines.

Function/Subroutine Documentation

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

DLARGV generates a vector of plane rotations with real cosines and real sines.

Purpose: 



 DLARGV generates a vector of real plane rotations, determined by


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


    (  c(i)  s(i) ) ( x(i) ) = ( a(i) )


    ( -s(i)  c(i) ) ( y(i) ) = (   0  )

Parameters:

N 



          N is INTEGER


          The number of plane rotations to be generated.

X



          X is DOUBLE PRECISION array,


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


          On entry, the vector x.


          On exit, x(i) is overwritten by a(i), for i = 1,...,n.

INCX



          INCX is INTEGER


          The increment between elements of X. INCX > 0.

Y



          Y is DOUBLE PRECISION array,


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


          On entry, the vector y.


          On exit, the sines of the plane rotations.

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.

INCC



          INCC is INTEGER


          The increment between elements of C. INCC > 0.

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

September 2012

Definition at line 105 of file dlargv.f.

Author

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Tue Sep 25 2012 Version 3.4.2