dlarscl2.f

Section: LAPACK (3)
Updated: Tue Nov 14 2017
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NAME

dlarscl2.f

SYNOPSIS

Functions/Subroutines

subroutine dlarscl2 (M, N, D, X, LDX)
DLARSCL2 performs reciprocal diagonal scaling on a vector.

Function/Subroutine Documentation

subroutine dlarscl2 (integer M, integer N, double precision, dimension( * ) D, double precision, dimension( ldx, * ) X, integer LDX)

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 is INTEGER
     The number of rows of D and X. M >= 0.

          N is INTEGER
     The number of columns of X. N >= 0.

          D is DOUBLE PRECISION array, dimension (M)
     Diagonal matrix D, stored as a vector of length M.

          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 >= M.

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

: June 2016

Definition at line 92 of file dlarscl2.f.

Author

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