DLARGV(1) LAPACK auxiliary routine (version 3.2) DLARGV(1)NAME
DLARGV - generates a vector of real plane rotations, determined by ele‐
ments of the real vectors x and y
SYNOPSIS
SUBROUTINE DLARGV( N, X, INCX, Y, INCY, C, INCC )
INTEGER INCC, INCX, INCY, N
DOUBLE PRECISION C( * ), X( * ), Y( * )
PURPOSE
DLARGV generates a vector of real plane rotations, determined by ele‐
ments 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 )
ARGUMENTS
N (input) INTEGER
The number of plane rotations to be generated.
X (input/output) 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 (input) INTEGER
The increment between elements of X. INCX > 0.
Y (input/output) DOUBLE PRECISION array,
dimension (1+(N-1)*INCY) On entry, the vector y. On exit, the
sines of the plane rotations.
INCY (input) INTEGER
The increment between elements of Y. INCY > 0.
C (output) DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
The cosines of the plane rotations.
INCC (input) INTEGER
The increment between elements of C. INCC > 0.
LAPACK auxiliary routine (versioNovember 2008 DLARGV(1)
