slargv()

subroutine slargv	(	integer	n,
		real, dimension( * )	x,
		integer	incx,
		real, dimension( * )	y,
		integer	incy,
		real, dimension( * )	c,
		integer	incc )

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

Download SLARGV + dependencies [TGZ] [ZIP] [TXT]

Purpose:

!>
!> SLARGV 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

[in]	N	!> N is INTEGER !> The number of plane rotations to be generated. !>
[in,out]	X	!> X is REAL array, !> dimension (1+(N-1)*INCX) !> On entry, the vector x. !> On exit, x(i) is overwritten by a(i), for i = 1,...,n. !>
[in]	INCX	!> INCX is INTEGER !> The increment between elements of X. INCX > 0. !>
[in,out]	Y	!> Y is REAL array, !> dimension (1+(N-1)*INCY) !> On entry, the vector y. !> On exit, the sines of the plane rotations. !>
[in]	INCY	!> INCY is INTEGER !> The increment between elements of Y. INCY > 0. !>
[out]	C	!> C is REAL array, dimension (1+(N-1)*INCC) !> The cosines of the plane rotations. !>
[in]	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.