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%% isproperty: Analogon zu "isfield"
% langsam aber notwendig
% 01.02.2011 Nicolas S.
function [out] = isproperty(obj,field)

props = properties(obj);
if isa(field,'char')
    out = any(strcmpi(props,field));
elseif isa(field,'cell')
out = false(size(field));
for ii = 1:numel(field);
   out(ii) = any(strcmpi(props,field{ii}));
end
else
    error('input type not supported');
end