NAME
DLARGV - generates a vector of real plane rotations, determined by elements 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 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 )
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.