slarscl2 (l) - Linux Manuals

slarscl2: performs a reciprocal diagonal scaling on an vector

NAME

SLARSCL2 - performs a reciprocal diagonal scaling on an vector

SYNOPSIS

SUBROUTINE SLARSCL2
( M, N, D, X, LDX )

    
IMPLICIT NONE

    
INTEGER M, N, LDX

    
REAL D( * ), X( LDX, * )

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.

ARGUMENTS

N (input) INTEGER
The size of the vectors X and D.
D (input) REAL array, length N
Diagonal matrix D, stored as a vector of length N.
X (input/output) REAL array, length N
On entry, the vector X to be scaled by D. On exit, the scaled vector.

Pages related to slarscl2

  • slarscl2 (3)
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  • slarfb (l) - applies a real block reflector H or its transpose Haq to a real m by n matrix C, from either the left or the right
  • slarfg (l) - generates a real elementary reflector H of order n, such that H * ( alpha ) = ( beta ), Haq * H = I
  • slarfp (l) - generates a real elementary reflector H of order n, such that H * ( alpha ) = ( beta ), Haq * H = I
  • slarft (l) - forms the triangular factor T of a real block reflector H of order n, which is defined as a product of k elementary reflectors