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67 lines
2.1 KiB
67 lines
2.1 KiB
8 months ago
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%-------------------------------------------------------------
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%
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% Copyright (C) 2007 Krister Svanberg
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%
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% This file, raaupdate.m, is part of GCMMA-MMA-code.
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%
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% GCMMA-MMA-code is free software; you can redistribute it and/or
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% modify it under the terms of the GNU General Public License as
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% published by the Free Software Foundation; either version 3 of
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% the License, or (at your option) any later version.
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%
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% This code is distributed in the hope that it will be useful,
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
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% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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% GNU General Public License for more details.
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%
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% You should have received a copy of the GNU General Public License
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% (file COPYING) along with this file. If not, see
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% <http://www.gnu.org/licenses/>.
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%
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% You should have received a file README along with this file,
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% containing contact information. If not, see
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% <http://www.smoptit.se/> or e-mail mmainfo@smoptit.se or krille@math.kth.se.
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%
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%------
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%
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% Version April 2007.
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%
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% Values of the parameters raa0 and raa are updated
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% during an inner iteration.
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%
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function [raa0,raa] = ...
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raaupdate(xmma,xval,xmin,xmax,low,upp,f0valnew,fvalnew, ...
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f0app,fapp,raa0,raa,raa0eps,raaeps,epsimin);
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%
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raacofmin = 10^(-12);
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eeem = ones(size(raa));
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eeen = ones(size(xmma));
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xmami = xmax-xmin;
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xmamieps = 0.00001*eeen;
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xmami = max(xmami,xmamieps);
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xxux = (xmma-xval)./(upp-xmma);
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xxxl = (xmma-xval)./(xmma-low);
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xxul = xxux.*xxxl;
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ulxx = (upp-low)./xmami;
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raacof = xxul'*ulxx;
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raacof = max(raacof,raacofmin);
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%
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f0appe = f0app + 0.5*epsimin;
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if f0valnew > f0appe
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deltaraa0 = (1/raacof)*(f0valnew-f0app);
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zz0 = 1.1*(raa0 + deltaraa0);
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zz0 = min(zz0,10*raa0);
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% zz0 = min(zz0,1000*raa0);
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raa0 = zz0;
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end
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%
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fappe = fapp + 0.5*epsimin*eeem;
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fdelta = fvalnew-fappe;
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deltaraa = (1/raacof)*(fvalnew-fapp);
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zzz = 1.1*(raa + deltaraa);
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zzz = min(zzz,10*raa);
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%zzz = min(zzz,1000*raa);
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raa(find(fdelta > 0)) = zzz(find(fdelta > 0));
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%---------------------------------------------------------------------
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