LAPACK
3.4.2
LAPACK: Linear Algebra PACKage

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Functions/Subroutines  
subroutine  zlargv (N, X, INCX, Y, INCY, C, INCC) 
ZLARGV generates a vector of plane rotations with real cosines and complex sines. 
subroutine zlargv  (  integer  N, 
complex*16, dimension( * )  X,  
integer  INCX,  
complex*16, dimension( * )  Y,  
integer  INCY,  
double precision, dimension( * )  C,  
integer  INCC  
) 
ZLARGV generates a vector of plane rotations with real cosines and complex sines.
Download ZLARGV + dependencies [TGZ] [ZIP] [TXT]ZLARGV generates a vector of complex plane rotations with real cosines, determined by elements of the complex vectors x and y. For i = 1,2,...,n ( c(i) s(i) ) ( x(i) ) = ( r(i) ) ( conjg(s(i)) c(i) ) ( y(i) ) = ( 0 ) where c(i)**2 + ABS(s(i))**2 = 1 The following conventions are used (these are the same as in ZLARTG, but differ from the BLAS1 routine ZROTG): If y(i)=0, then c(i)=1 and s(i)=0. If x(i)=0, then c(i)=0 and s(i) is chosen so that r(i) is real.
[in]  N  N is INTEGER The number of plane rotations to be generated. 
[in,out]  X  X is COMPLEX*16 array, dimension (1+(N1)*INCX) On entry, the vector x. On exit, x(i) is overwritten by r(i), for i = 1,...,n. 
[in]  INCX  INCX is INTEGER The increment between elements of X. INCX > 0. 
[in,out]  Y  Y is COMPLEX*16 array, dimension (1+(N1)*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 DOUBLE PRECISION array, dimension (1+(N1)*INCC) The cosines of the plane rotations. 
[in]  INCC  INCC is INTEGER The increment between elements of C. INCC > 0. 
6696  Modified with a new algorithm by W. Kahan and J. Demmel This version has a few statements commented out for thread safety (machine parameters are computed on each entry). 10 feb 03, SJH.
Definition at line 123 of file zlargv.f.