spm_cat_struct.m
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			function s = spm_cat_struct(s1, s2, varargin)
			% Concatenates structure arrays with possibly different fields
			% FORMAT s = spm_cat_struct(s1, s2, ...)
			%__________________________________________________________________________
			% Copyright (C) 2013-2017 Wellcome Trust Centre for Neuroimaging

			% Vladimir Litvak
			% $Id: spm_cat_struct.m 7074 2017-05-05 10:51:08Z guillaume $


			if ~nargin
			s1 = struct([]);
			s2 = struct([]);
			elseif nargin == 1
			s2 = struct([]);
			elseif nargin > 2
			s2 = spm_cat_struct(s2,varargin{:});
			end

			if isempty(s1)
			s = s2;
			elseif isempty(s2)
			s = s1;
			else
			addfields1 = setdiff(fieldnames(s2), fieldnames(s1));
			for i = 1:numel(addfields1)
			[s1.(addfields1{i})] = deal([]);
			end

			addfields2 = setdiff(fieldnames(s1), fieldnames(s2));
			for i = 1:numel(addfields2)
			[s2.(addfields2{i})] = deal([]);
			end

			s = [s1(:); s2(:)];

			if size(s1, 1) == 1
			s = s';
			end
			end

iCAPs_v2/packages/spm12/spm_cat_struct.me5f5005bb2efmaster