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larscl2(3) LAPACK 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 

!>          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.

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 

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

X

!>          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.

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 

!>          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.

subroutine zlarscl2 (integer m, integer n, double precision, dimension( * ) d, complex*16, 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 

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

X

!>          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.

Author

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