SRC/clarscl2.f(3) Library Functions Manual SRC/clarscl2.f(3)

SRC/clarscl2.f


subroutine clarscl2 (m, n, d, x, ldx)
CLARSCL2 performs reciprocal diagonal scaling on a matrix.

CLARSCL2 performs reciprocal diagonal scaling on a matrix.

Purpose:

 CLARSCL2 performs a reciprocal diagonal scaling on a matrix:
   x <-- inv(D) * x
 where the REAL diagonal matrix D is stored as a vector.
 Eventually to be replaced by BLAS_cge_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 COMPLEX 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 90 of file clarscl2.f.

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