LAPACK
3.4.2
LAPACK: Linear Algebra PACKage

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Functions/Subroutines  
subroutine  dlarfx (SIDE, M, N, V, TAU, C, LDC, WORK) 
DLARFX applies an elementary reflector to a general rectangular matrix, with loop unrolling when the reflector has order ≤ 10. 
subroutine dlarfx  (  character  SIDE, 
integer  M,  
integer  N,  
double precision, dimension( * )  V,  
double precision  TAU,  
double precision, dimension( ldc, * )  C,  
integer  LDC,  
double precision, dimension( * )  WORK  
) 
DLARFX applies an elementary reflector to a general rectangular matrix, with loop unrolling when the reflector has order ≤ 10.
Download DLARFX + dependencies [TGZ] [ZIP] [TXT]DLARFX applies a real elementary reflector H to a real m by n matrix C, from either the left or the right. H is represented in the form H = I  tau * v * v**T where tau is a real scalar and v is a real vector. If tau = 0, then H is taken to be the unit matrix This version uses inline code if H has order < 11.
[in]  SIDE  SIDE is CHARACTER*1 = 'L': form H * C = 'R': form C * H 
[in]  M  M is INTEGER The number of rows of the matrix C. 
[in]  N  N is INTEGER The number of columns of the matrix C. 
[in]  V  V is DOUBLE PRECISION array, dimension (M) if SIDE = 'L' or (N) if SIDE = 'R' The vector v in the representation of H. 
[in]  TAU  TAU is DOUBLE PRECISION The value tau in the representation of H. 
[in,out]  C  C is DOUBLE PRECISION array, dimension (LDC,N) On entry, the m by n matrix C. On exit, C is overwritten by the matrix H * C if SIDE = 'L', or C * H if SIDE = 'R'. 
[in]  LDC  LDC is INTEGER The leading dimension of the array C. LDA >= (1,M). 
[out]  WORK  WORK is DOUBLE PRECISION array, dimension (N) if SIDE = 'L' or (M) if SIDE = 'R' WORK is not referenced if H has order < 11. 
Definition at line 121 of file dlarfx.f.