DLARSCL2(1) | LAPACK routine (version 3.2) | DLARSCL2(1) |
NAME¶
DLARSCL2 - performs a reciprocal diagonal scaling on an vector
SYNOPSIS¶
- SUBROUTINE DLARSCL2
- ( M, N, D, X, LDX )
IMPLICIT NONE INTEGER M, N, LDX DOUBLE PRECISION D( * ), X( LDX, * )
PURPOSE¶
DLARSCL2 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) DOUBLE PRECISION array, length N
- Diagonal matrix D, stored as a vector of length N.
- X (input/output) DOUBLE PRECISION array, length N
- On entry, the vector X to be scaled by D. On exit, the scaled vector.
November 2008 | LAPACK routine (version 3.2) |