32 lines
974 B
Matlab
32 lines
974 B
Matlab
function aa = isconst(y)
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% Returns 1 if vector y is constant, 0 otherwise.
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%
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% INPUTS:
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% yy [double] n*1 vector.
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%
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% OUTPUTS
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% aa [integer] scalar equal to 1 or 0.
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%
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% SPECIAL REQUIREMENTS
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% none
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% Copyright (C) 2008-2009 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 <http://www.gnu.org/licenses/>
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aa = 0;
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if all(abs(y(2:end)-y(1:end-1))<1e-10)
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aa = 1;
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end |