NAME

dlartv - applie a vector of real plane rotations to elements of the real vectors x and y

SYNOPSIS

SUBROUTINE DLARTV(
N, X, INCX, Y, INCY, C, S, INCC )

void dlartv(long int n, double ∗dx, long int incx,
double ∗dy, long int incy, double ∗dc, double ∗s, long int incc)

INTEGER INCC, INCX, INCY, N

DOUBLE PRECISION C( ∗ ), S( ∗ ), X( ∗ ), Y( ∗ )

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) )
 

ARGUMENTS

N       (input) INTEGER
The number of plane rotations to be applied.

X       (input/output) DOUBLE PRECISION array,
dimension (1+(N-1)∗INCX) The vector x.

INCX    (input) INTEGER
The increment between elements of X. INCX > 0.

Y       (input/output) DOUBLE PRECISION array,
dimension (1+(N-1)∗INCY) The vector y.

INCY    (input) INTEGER
The increment between elements of Y. INCY > 0.

C       (input) DOUBLE PRECISION array, dimension (1+(N-1)∗INCC)
The cosines of the plane rotations.

S       (input) DOUBLE PRECISION array, dimension (1+(N-1)∗INCC)
The sines of the plane rotations.

INCC    (input) INTEGER
The increment between elements of C and S. INCC > 0.

Sun, Inc.  —  Last change: 20 Sep 1996