73 lines
2.2 KiB
Matlab
73 lines
2.2 KiB
Matlab
function [errorcode, varargout] = common_size (varargin)
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% COMMON_SIZE Checks that all inputs are either scalar or of common size
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% [ERR, Y1, ...] = common_size(X1, ...)
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% Determine if all input arguments are either scalar or of common
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% size. If so, ERR is zero, and YI is a matrix of the
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% common size with all entries equal to XI if this is a scalar or
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% XI otherwise. If the inputs cannot be brought to a common size,
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% errorcode is 1, and YI is XI.
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%
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% Example:
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% [errorcode, a, b] = common_size([1 2; 3 4], 5)
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% >> errorcode = 0
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% >> a = [ 1, 2; 3, 4 ]
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% >> b = [ 5, 5; 5, 5 ]
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% Adapted from GNU Octave 3.0.1
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% Original file: general/common_size.m
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% Original author: KH <Kurt.Hornik@wu-wien.ac.at>
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% Copyright © 1995, 1996, 1999, 2000, 2002, 2004, 2005, 2007 Kurt Hornik
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% Copyright © 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 <https://www.gnu.org/licenses/>.
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if (nargin < 2)
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error ('common_size: only makes sense if nargin >= 2');
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end
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len = 2;
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for i = 1 : nargin
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sz = size (varargin{i});
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if (length (sz) < len)
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s(i,:) = [sz, ones(1,len - length(sz))];
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else
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if (length (sz) > len)
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if (i > 1)
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s = [s, ones(size(s,1), length(sz) - len)];
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end
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len = length (sz);
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end
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s(i,:) = sz;
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end
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end
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m = max (s);
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if (any (any ((s ~= 1)') & any ((s ~= ones (nargin, 1) * m)')))
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errorcode = 1;
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varargout = varargin;
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else
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errorcode = 0;
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for i = 1 : nargin
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varargout{i} = varargin{i};
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if (prod (s(i,:)) == 1)
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varargout{i} = varargout{i} * ones (m);
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end
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end
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end
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end
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