larscl23
Larscl2: reciprocal diagonal scale matrix, a = d^{-1} a
Usage
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.
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
!> 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.
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
!> 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.
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.
Definition at line 90 of file zlarscl2.f.
Releases
2 releases since Debian 13 (Trixie); the text changed 1 time.