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zlarscl2.f(3) LAPACK zlarscl2.f(3)

NAME

zlarscl2.f -

SYNOPSIS

Functions/Subroutines


subroutine zlarscl2 (M, N, D, X, LDX)
 
ZLARSCL2 performs reciprocal diagonal scaling on a vector.

Function/Subroutine Documentation

subroutine zlarscl2 (integerM, integerN, double precision, dimension( * )D, complex*16, dimension( ldx, * )X, integerLDX)

ZLARSCL2 performs reciprocal diagonal scaling on a vector.
Purpose: 
 ZLARSCL2 performs a reciprocal diagonal scaling on an vector:
   x <-- inv(D) * x
 where the DOUBLE PRECISION diagonal matrix D is stored as a vector.


 Eventually to be replaced by BLAS_zge_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, length M
     Diagonal matrix D, stored as a vector of length M.
X 
          X is COMPLEX*16 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 zlarscl2.f.

Author

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