slarscl2.f man page

slarscl2.f —

Synopsis

Functions/Subroutines

subroutine slarscl2 (M, N, D, X, LDX)
SLARSCL2 performs reciprocal diagonal scaling on a vector.

Function/Subroutine Documentation

subroutine slarscl2 (integerM, integerN, real, dimension( * )D, real, dimension( ldx, * )X, integerLDX)

SLARSCL2 performs reciprocal diagonal scaling on a vector.

Purpose:

SLARSCL2 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_sge_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 REAL array, length M
Diagonal matrix D, stored as a vector of length M.

X

     X is REAL 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 slarscl2.f.

Author

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Referenced By

slarscl2(3) is an alias of slarscl2.f(3).

Sat Nov 16 2013 Version 3.4.2 LAPACK