45 lines
1.6 KiB
Mathematica
45 lines
1.6 KiB
Mathematica
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%%*****************************************************************
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%% HSDNTdirfun: compute (dX,dZ), given dy, for the NT direction.
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%%*****************************************************************
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%% SDPT3: version 4.0
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%% Copyright (c) 1997 by
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%% Kim-Chuan Toh, Michael J. Todd, Reha H. Tutuncu
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%% Last Modified: 16 Sep 2004
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%%*****************************************************************
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function [par,dX,dy,dZ] = HSDNTdirfun(blk,At,par,Rd,EinvRc,xx)
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global solve_ok
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dX = cell(size(blk,1),1); dZ = cell(size(blk,1),1); dy = [];
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if (any(isnan(xx)) | any(isinf(xx)))
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solve_ok = 0;
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fprintf('\n HSDNTdirfun: solution contains NaN or inf.');
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return;
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end
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%%
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m = par.m;
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dy2 = xx(1:m+2);
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%%
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for p=1:size(blk,1)
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pblk = blk(p,:);
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if strcmp(pblk{1},'l')
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dZ(p) = ops(Rd(p),'-',Atyfun(pblk,At(p,:),[],[],dy2));
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tmp = par.dd{p}.*dZ{p};
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dX{p} = EinvRc{p} - tmp;
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elseif strcmp(pblk{1},'q')
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dZ(p) = ops(Rd(p),'-',Atyfun(pblk,At(p,:),[],[],dy2));
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tmp = par.dd{p}.*dZ{p} + qops(pblk,qops(pblk,dZ{p},par.ee{p},1),par.ee{p},3);
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dX{p} = EinvRc{p} - tmp;
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elseif strcmp(pblk{1},'s')
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dZ(p) = ops(Rd(p),'-',Atyfun(pblk,At(p,:),par.permA(p,:),par.isspAy(p),dy2));
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tmp = Prod3(pblk,par.W{p},dZ{p},par.W{p},1);
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dX{p} = EinvRc{p}-tmp;
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end
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end
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dy = dy2(1:m);
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par.dtau = dy2(m+1);
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par.dtheta = dy2(m+2);
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par.dkap = (par.mu./par.tau - par.kap) - par.kap*(par.dtau/par.tau);
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%%*******************************************************************
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