/usr/share/dynare/matlab/bksupk.m is in dynare-common 4.4.1-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | function d1 = bksupk(ny,fid,jcf,icc1)
% function d1 = bksupk(ny,fid,jcf,icc1)
% Solves deterministic models recursively by backsubstitution for k leads/lags
%
% INPUTS
% ny: number of endogenous variables
% fid: saves the elements above the diagonal
% jcf: variables index forward
% icc1: jacobian column forward
%
% OUTPUTS
% d1: vector of backsubstitution results
%
% SPECIAL REQUIREMENTS
% none
% Copyright (C) 2003-2011 Dynare Team
%
% This file is part of Dynare.
%
% Dynare 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.
%
% Dynare 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 Dynare. If not, see <http://www.gnu.org/licenses/>.
global M_ options_
icf = [1:jcf-1] ;
ir = [(options_.periods-1)*ny+1:ny*options_.periods] ;
irf = icc1+(options_.periods-1)*ny ;
d1 = zeros(options_.periods*ny,1) ;
ofs = (((options_.periods-1)*ny+1)-1)*jcf*8 ;
junk = fseek(fid,ofs,-1) ;
c = fread(fid,[jcf,ny],'float64')';
d1(ir) = c(:,jcf) ;
ir = ir-ny ;
i = 2 ;
while i <= M_.maximum_lead || i <= options_.periods
irf1 = selif(irf,irf<=options_.periods*ny) ;
ofs = (((options_.periods-i)*ny+1)-1)*jcf*8 ;
junk = fseek(fid,ofs,-1) ;
c = fread(fid,[jcf,ny],'float64')' ;
d1(ir) = c(:,jcf) - c(:,1:size(irf1,1))*d1(irf1) ;
ir = ir - ny ;
irf = irf - ny ;
i = i + 1 ;
end
while i <= options_.periods
ofs = (((options_.periods-i)*ny+1)-1)*jcf*8 ;
junk = fseek(fid,ofs,-1) ;
c = fread(fid,[jcf,ny],'float64')' ;
d1(ir) = c(:,jcf)-c(:,icf)*d1(irf) ;
ir = ir-ny ;
irf = irf-ny ;
i = i+1;
end
return ;
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