DLARGV
November 2006
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 )
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.
|