larscl2(3)

Library Functions Manual

larscl2(3)

NAME

larscl2 - larscl2: reciprocal diagonal scale matrix, A = D^{-1} A

SYNOPSIS

Functions

subroutine clarscl2 (m, n, d, x, ldx)
CLARSCL2 performs reciprocal diagonal scaling on a matrix. subroutine dlarscl2 (m, n, d, x, ldx)
DLARSCL2 performs reciprocal diagonal scaling on a matrix. subroutine slarscl2 (m, n, d, x, ldx)
SLARSCL2 performs reciprocal diagonal scaling on a matrix. subroutine zlarscl2 (m, n, d, x, ldx)
ZLARSCL2 performs reciprocal diagonal scaling on a matrix.

Detailed Description

Function Documentation

subroutine clarscl2 (integer m, integer n, real, dimension( * ) d, complex, dimension( ldx, * ) x, integer ldx)

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

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

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

          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.

subroutine dlarscl2 (integer m, integer n, double precision, dimension( * ) d, double precision, dimension( ldx, * ) x, integer ldx)

DLARSCL2 performs reciprocal diagonal scaling on a matrix.

Purpose:

 DLARSCL2 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_dge_diag_scale in the new BLAS
 standard.

Parameters

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

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

          D is DOUBLE PRECISION array, dimension (M)
     Diagonal matrix D, stored as a vector of length M.

          X is DOUBLE PRECISION 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 dlarscl2.f.

subroutine slarscl2 (integer m, integer n, real, dimension( * ) d, real, dimension( ldx, * ) x, integer ldx)

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

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

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

          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.

subroutine zlarscl2 (integer m, integer n, double precision, dimension( * ) d, complex16, dimension( ldx, ) x, integer ldx)

ZLARSCL2 performs reciprocal diagonal scaling on a matrix.

Purpose:

 ZLARSCL2 performs a reciprocal diagonal scaling on a matrix:
   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 is INTEGER
     The number of rows of D and X. M >= 0.

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

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

          X is COMPLEX*16 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 zlarscl2.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Version 3.12.0

LAPACK