slarscl2.f - Man Page

subroutine slarscl2 (m, n, d, x, ldx)
SLARSCL2 performs reciprocal diagonal scaling on a matrix.

SLARSCL2 performs reciprocal diagonal scaling on a matrix.  

Purpose:

 SLARSCL2 performs a reciprocal diagonal scaling on a matrix:
   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.

Parameters

M

          M is INTEGER
     The number of rows of D and X. M >= 0.

N

          N is INTEGER
     The number of columns of X. N >= 0.

D

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

X

          X is REAL array, dimension (LDX,N)
     On entry, the matrix X to be scaled by D.
     On exit, the scaled matrix.

LDX

          LDX is INTEGER
     The leading dimension of the matrix X. LDX >= M.

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 89 of file slarscl2.f.