dlarscl2.f(3) LAPACK dlarscl2.f(3)NAMEdlarscl2.f-
SYNOPSIS
Functions/Subroutines
subroutine dlarscl2 (M, N, D, X, LDX)
DLARSCL2 performs reciprocal diagonal scaling on a vector.
Function/Subroutine Documentation
subroutine dlarscl2 (integerM, integerN, double precision, dimension( * )D,
double precision, dimension( ldx, * )X, integerLDX)
DLARSCL2 performs reciprocal diagonal scaling on a vector.
Purpose:
DLARSCL2 performs a reciprocal diagonal scaling on an vector:
x <-- inv(D) * x
where the diagonal matrix D is stored as a vector.
Eventually to be replaced by BLAS_dge_diag_scale in the new BLAS
standard.
Parameters:
M
M is INTEGER
The number of rows of D and X. M >= 0.
N
N is INTEGER
The number of columns of D and X. N >= 0.
D
D is DOUBLE PRECISION array, dimension (M)
Diagonal matrix D, stored as a vector of length M.
X
X is DOUBLE PRECISION array, dimension (LDX,N)
On entry, the vector X to be scaled by D.
On exit, the scaled vector.
LDX
LDX 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 91 of file dlarscl2.f.
Author
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Version 3.4.2 Sat Nov 16 2013 dlarscl2.f(3)
