clarscl2-f(3)

clarscl2.f –

Synopsis

Functions/Subroutines

subroutine clarscl2 (M, N, D, X, LDX)
CLARSCL2 performs reciprocal diagonal scaling on a vector.

Function/Subroutine Documentation

subroutine clarscl2 (integerM, integerN, real, dimension( * )D, complex, dimension( ldx, * )X, integerLDX)

CLARSCL2 performs reciprocal diagonal scaling on a vector.

Purpose:

 CLARSCL2 performs a reciprocal diagonal scaling on an vector:
 x <-- inv(D) * x
 where the REAL diagonal matrix D is stored as a vector.
 Eventually to be replaced by BLAS_cge_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 D and X. N >= 0.

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

 X is COMPLEX 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 92 of file clarscl2.f.

Author

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