pmat4::corral Interface Reference

Private Member Functions
subroutine	corral (m, n, mask, a, d, aa, e)
	Find positive diagonals D and E and a Lagrange multiplier F that minimize the row-sum +column-sum of masked terms, (D_i +log(|A_ij|) +E_j)^2 subject to the single constraint, sum_j E_j =0, where the mask permits only nonnegligible A_ij to participate in the quadratic quantities. More...

Detailed Description

Definition at line 91 of file pmat4.f90.

Constructor & Destructor Documentation

corral()

subroutine pmat4::corral::corral ( integer(spi), intent(in)  m, integer(spi), intent(in)  n, logical, dimension(m,n), intent(in)  mask, real(dp), dimension(m,n), intent(in)  a, real(dp), dimension(m ), intent(out)  d, real(dp), dimension(m,n), intent(out)  aa, real(dp), dimension( n), intent(out)  e  )

private

Find positive diagonals D and E and a Lagrange multiplier F that minimize the row-sum +column-sum of masked terms, (D_i +log(|A_ij|) +E_j)^2 subject to the single constraint, sum_j E_j =0, where the mask permits only nonnegligible A_ij to participate in the quadratic quantities.

Once a solution for D and E is found, return their exponentials, d and e, together with the rescaled matrix aa such that a = d.aa.e when d and e are interpreted as diagonal matrices.

Parameters

[in]	m	number of rows of A
[in]	n	number of columns of A
[in]	mask	logical mask
[in]	a	real rectangular matrix A
[out]	d	positive diagonal matrix of dimension m
[in]	aa	rescaled version of A
[out]	e	positive diagonal matrix of dimension n

Author

R. J. Purser

Definition at line 1441 of file pmat4.f90.

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

• /scratch1/NCEPDEV/da/George.Gayno/ufs_utils.git/UFS_UTILS/sorc/grid_tools.fd/regional_esg_grid.fd/pmat4.f90