34 lines
1.0 KiB
Matlab
34 lines
1.0 KiB
Matlab
function A = isconst(B)
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% Returns an array of logicals, i-th element is `true` if column i of B is constant, `false` otherwise.
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%
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% INPUTS:
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% - B [double] n×m matrix.
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%
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% OUTPUTS
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% - A [logical] 1×m vector.
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% Copyright © 2008-2019 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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A = false(1, size(B, 2));
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for i = 1:size(B, 2)
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if all(abs(B(2:end,i)-B(1:end-1,i))<1e-12)
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A(i) = true;
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end
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end |