Mercurial > octave-nkf
view liboctave/numeric/base-min.h @ 20643:d6d04088ac9e
nbininv.m: Increase speed (85X) and accuracy of function (bug #34363).
* nbininv.m: Call new function scalar_nbininv to calculate nbininv for scalar.
If there are still uncalculated values then call bin_search_nbininv. Call
bin_search_nbininv directly for vectors. Add more BIST tests.
* nbininv.m (scalar_binoinv): New subfunction to calculate nbininv for scalar x.
Stops when x > 1000.
* nbininv.m (bin_search_nbininv): New subfunction to do binary search for nbininv.
author | Lachlan Andrew <lachlanbis@gmail.com> |
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date | Sun, 11 Oct 2015 20:33:37 -0700 |
parents | 5dfaaaae784f |
children |
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/* Copyright (C) 1995-2015 John W. Eaton 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_base_min_h) #define octave_base_min_h 1 #include "dColVector.h" class base_minimizer { public: base_minimizer (void) : x () { } base_minimizer (const ColumnVector& xx) : x (xx) { } base_minimizer (const base_minimizer& a) : x (a.x) { } virtual ~base_minimizer (void) { } base_minimizer& operator = (const base_minimizer& a) { if (this != &a) x = a.x; return *this; } // Derived classes must provide a function to actually do the // minimization. virtual ColumnVector do_minimize (double& objf, octave_idx_type& inform, ColumnVector& lambda) = 0; // Lots of ways to call the single function and optionally set and // get additional information. virtual ColumnVector minimize (void) { double objf; octave_idx_type inform; ColumnVector lambda; return do_minimize (objf, inform, lambda); } virtual ColumnVector minimize (double& objf) { octave_idx_type inform; ColumnVector lambda; return do_minimize (objf, inform, lambda); } virtual ColumnVector minimize (double& objf, octave_idx_type& inform) { ColumnVector lambda; return do_minimize (objf, inform, lambda); } virtual ColumnVector minimize (double& objf, octave_idx_type& inform, ColumnVector& lambda) { return do_minimize (objf, inform, lambda); } virtual ColumnVector minimize (const ColumnVector& x0) { x = x0; double objf; octave_idx_type inform; ColumnVector lambda; return do_minimize (objf, inform, lambda); } virtual ColumnVector minimize (const ColumnVector& x0, double& objf) { x = x0; octave_idx_type inform; ColumnVector lambda; return do_minimize (objf, inform, lambda); } virtual ColumnVector minimize (const ColumnVector& x0, double& objf, octave_idx_type& inform) { x = x0; ColumnVector lambda; return do_minimize (objf, inform, lambda); } virtual ColumnVector minimize (const ColumnVector& x0, double& objf, octave_idx_type& inform, ColumnVector& lambda) { x = x0; return do_minimize (objf, inform, lambda); } octave_idx_type size (void) const { return x.numel (); } protected: ColumnVector x; }; #endif