zlarscl2.f (3)  Linux Man Pages
NAME
zlarscl2.f 
SYNOPSIS
Functions/Subroutines
subroutine zlarscl2 (M, N, D, X, LDX)
ZLARSCL2 performs reciprocal diagonal scaling on a vector.
Function/Subroutine Documentation
subroutine zlarscl2 (integerM, integerN, double precision, dimension( * )D, complex*16, dimension( ldx, * )X, integerLDX)
ZLARSCL2 performs reciprocal diagonal scaling on a vector.
Purpose:

ZLARSCL2 performs a reciprocal diagonal scaling on an vector: x < inv(D) * x where the DOUBLE PRECISION diagonal matrix D is stored as a vector. Eventually to be replaced by BLAS_zge_diag_scale in the new BLAS standard.
Parameters:

M
M is INTEGER The number of rows of D and X. M >= 0.
NN is INTEGER The number of columns of D and X. N >= 0.
DD is DOUBLE PRECISION array, length M Diagonal matrix D, stored as a vector of length M.
XX is COMPLEX*16 array, dimension (LDX,N) On entry, the vector X to be scaled by D. On exit, the scaled vector.
LDXLDX is INTEGER The leading dimension of the vector X. LDX >= 0.
Author:

Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
 September 2012
Definition at line 92 of file zlarscl2.f.
Author
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