la_lapack::geequ Interface Reference

GEEQU: computes row and column scalings intended to equilibrate an M-by-N matrix A and reduce its condition number. R returns the row scale factors and C the column scale factors, chosen to try to make the largest element in each row and column of the matrix B with elements B(i,j)=R(i)*A(i,j)*C(j) have absolute value 1. R(i) and C(j) are restricted to be between SMLNUM = smallest safe number and BIGNUM = largest safe number. Use of these scaling factors is not guaranteed to reduce the condition number of A but works well in practice. More...

Public Member Functions
pure subroutine	cgeequ (m, n, a, lda, r, c, rowcnd, colcnd, amax, info)
	la_cgeequ
pure subroutine	dgeequ (m, n, a, lda, r, c, rowcnd, colcnd, amax, info)
	la_dgeequ
	la_qgeequ
pure subroutine	sgeequ (m, n, a, lda, r, c, rowcnd, colcnd, amax, info)
	la_sgeequ
	la_wgeequ
pure subroutine	zgeequ (m, n, a, lda, r, c, rowcnd, colcnd, amax, info)
	la_zgeequ

Detailed Description

GEEQU: computes row and column scalings intended to equilibrate an M-by-N matrix A and reduce its condition number. R returns the row scale factors and C the column scale factors, chosen to try to make the largest element in each row and column of the matrix B with elements B(i,j)=R(i)*A(i,j)*C(j) have absolute value 1. R(i) and C(j) are restricted to be between SMLNUM = smallest safe number and BIGNUM = largest safe number. Use of these scaling factors is not guaranteed to reduce the condition number of A but works well in practice.

Member Function/Subroutine Documentation

cgeequ()

pure subroutine la_lapack::geequ::cgeequ	(	integer(ilp), intent(in)	m,
		integer(ilp), intent(in)	n,
		complex(sp), dimension(lda,*), intent(in)	a,
		integer(ilp), intent(in)	lda,
		real(sp), dimension(*), intent(out)	r,
		real(sp), dimension(*), intent(out)	c,
		real(sp), intent(out)	rowcnd,
		real(sp), intent(out)	colcnd,
		real(sp), intent(out)	amax,
		integer(ilp), intent(out)	info )

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dgeequ()

pure subroutine la_lapack::geequ::dgeequ	(	integer(ilp), intent(in)	m,
		integer(ilp), intent(in)	n,
		real(dp), dimension(lda,*), intent(in)	a,
		integer(ilp), intent(in)	lda,
		real(dp), dimension(*), intent(out)	r,
		real(dp), dimension(*), intent(out)	c,
		real(dp), intent(out)	rowcnd,
		real(dp), intent(out)	colcnd,
		real(dp), intent(out)	amax,
		integer(ilp), intent(out)	info )

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la_cgeequ()

la_lapack::geequ::la_cgeequ

la_dgeequ()

la_lapack::geequ::la_dgeequ

la_qgeequ()

la_lapack::geequ::la_qgeequ

la_sgeequ()

la_lapack::geequ::la_sgeequ

la_wgeequ()

la_lapack::geequ::la_wgeequ

la_zgeequ()

la_lapack::geequ::la_zgeequ

sgeequ()

pure subroutine la_lapack::geequ::sgeequ	(	integer(ilp), intent(in)	m,
		integer(ilp), intent(in)	n,
		real(sp), dimension(lda,*), intent(in)	a,
		integer(ilp), intent(in)	lda,
		real(sp), dimension(*), intent(out)	r,
		real(sp), dimension(*), intent(out)	c,
		real(sp), intent(out)	rowcnd,
		real(sp), intent(out)	colcnd,
		real(sp), intent(out)	amax,
		integer(ilp), intent(out)	info )

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zgeequ()

pure subroutine la_lapack::geequ::zgeequ	(	integer(ilp), intent(in)	m,
		integer(ilp), intent(in)	n,
		complex(dp), dimension(lda,*), intent(in)	a,
		integer(ilp), intent(in)	lda,
		real(dp), dimension(*), intent(out)	r,
		real(dp), dimension(*), intent(out)	c,
		real(dp), intent(out)	rowcnd,
		real(dp), intent(out)	colcnd,
		real(dp), intent(out)	amax,
		integer(ilp), intent(out)	info )

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The documentation for this interface was generated from the following file:

• la_lapack.f90