zlarscl2(l) - Linux man page

Name

ZLARSCL2 - performs a reciprocal diagonal scaling on an vector

Synopsis

SUBROUTINE ZLARSCL2

( M, N, D, X, LDX )

IMPLICIT

NONE

INTEGER

M, N, LDX

COMPLEX*16

X( LDX, * )

DOUBLE

PRECISION D( * )

Purpose

ZLARSCL2 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.

Arguments

The size of the vectors X and D.

D (input) DOUBLE PRECISION array, length N

Diagonal matrix D, stored as a vector of length N. X (input/output) COMPLEX*16 array, length N On entry, the vector X to be scaled by D. On exit, the scaled vector.