70 lines
2.7 KiB
Matlab
70 lines
2.7 KiB
Matlab
function [expression, lhs] = rewrite_equation_with_tables(expression, lhs, islaggedvariables, pnames, enames, xnames, pid, eid, xid, data)
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% Takes and expression of parameters and variables (with max. lag equal to one)
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% and replace parameters by elements of a vector and variables by columns of a
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% data matrix.
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% Copyright © 2021 Dynare Team
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%
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% This file is part of Dynare.
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%
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% Dynare is free software: you can redistribute it and/or modify
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% it under the terms of the GNU General Public License as published by
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% the Free Software Foundation, either version 3 of the License, or
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% (at your option) any later version.
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%
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% Dynare 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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% along with Dynare. If not, see <https://www.gnu.org/licenses/>.
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% List of objects to be replaced
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objNames = [pnames; enames; xnames];
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objIndex = [pid; eid; xid];
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objTypes = [ones(length(pid), 1); 2*ones(length(eid)+length(xid), 1)];
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[~,I] = sort(cellfun(@length, objNames), 'descend');
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objNames = objNames(I);
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objIndex = objIndex(I);
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objTypes = objTypes(I);
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% Substitute parameters and variables. Note that in the transformed model (we consider rhs
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% instead of RHS) the maximum lag is 1.
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for i=1:length(objNames)
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switch objTypes(i)
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case 1
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expression = strrep(expression, objNames{i}, sprintf('M_.params(%u)', objIndex(i)));
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case 2
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k = find(strcmp(objNames{i}, data.name));
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if isempty(k)
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error('Variable %s is missing in the database.', objNames{i})
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end
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j = regexp(expression, ['\<', objNames{i}, '\>']);
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if islaggedvariables
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jlag = regexp(expression, ['\<', objNames{i}, '\(-1\)']);
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if ~isempty(jlag)
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expression = regexprep(expression, ['\<' objNames{i} '\(-1\)'], sprintf('data(1:end-1,%u)', k));
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end
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if ~isempty(setdiff(j, jlag))
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expression = regexprep(expression, ['\<' objNames{i} '\>'], sprintf('data(2:end,%u)', k));
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end
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else
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expression = regexprep(expression, ['\<' objNames{i} '\>'], sprintf('data(:,%u)', k));
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end
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if contains(lhs, objNames{i})
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if islaggedvariables
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lhs = strrep(lhs, objNames{i}, sprintf('data(2:end,%u)', k));
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else
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lhs = strrep(lhs, objNames{i}, sprintf('data(:,%u)', k));
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end
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end
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end
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end
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% Allow elementwise operations
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expression = strrep(expression, '^', '.^');
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expression = strrep(expression, '/', './');
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expression = strrep(expression, '*', '.*'); |