Mercurial > octave
view liboctave/numeric/aepbalance.h @ 23219:3ac9f9ecfae5 stable
maint: Update copyright dates.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 22 Feb 2017 12:39:29 -0500 |
parents | e9a0469dedd9 |
children | 092078913d54 |
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/* Copyright (C) 1994-2017 John W. Eaton Copyright (C) 2008-2016 Jaroslav Hajek This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #if ! defined (octave_aepbalance_h) #define octave_aepbalance_h 1 #include "octave-config.h" namespace octave { namespace math { template <typename MT> class aepbalance { public: typedef typename MT::real_column_vector_type VT; aepbalance (void) : balanced_mat (), scale (), ilo (), ihi (), job () { } aepbalance (const MT& a, bool noperm = false, bool noscal = false); aepbalance (const aepbalance& a) : balanced_mat (a.balanced_mat), scale (a.scale), ilo(a.ilo), ihi(a.ihi), job(a.job) { } aepbalance& operator = (const aepbalance& a) { if (this != &a) { balanced_mat = a.balanced_mat; scale = a.scale; ilo = a.ilo; ihi = a.ihi; job = a.job; } return *this; } virtual ~aepbalance (void) { } MT balancing_matrix (void) const; MT balanced_matrix (void) const { return balanced_mat; } VT permuting_vector (void) const { octave_idx_type n = balanced_mat.rows (); VT pv (n); for (octave_idx_type i = 0; i < n; i++) pv(i) = i+1; for (octave_idx_type i = n-1; i >= ihi; i--) { octave_idx_type j = scale(i) - 1; std::swap (pv(i), pv(j)); } for (octave_idx_type i = 0; i < ilo-1; i++) { octave_idx_type j = scale(i) - 1; std::swap (pv(i), pv(j)); } return pv; } VT scaling_vector (void) const { octave_idx_type n = balanced_mat.rows (); VT scv (n); for (octave_idx_type i = 0; i < ilo-1; i++) scv(i) = 1; for (octave_idx_type i = ilo-1; i < ihi; i++) scv(i) = scale(i); for (octave_idx_type i = ihi; i < n; i++) scv(i) = 1; return scv; } protected: MT balanced_mat; VT scale; octave_idx_type ilo; octave_idx_type ihi; char job; }; } } #endif