function tf = isZero(o)
%function o = isZero(o)
% Write the tikz file that contains the graph
%
% INPUTS
%   o   [report_series] report_series object
%
% OUTPUTS
%   o   [report_series] report_series object
%
% SPECIAL REQUIREMENTS
%   none

% Copyright © 2015-2023 Dynare Team
%
% This file is part of Dynare.
%
% Dynare is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% Dynare is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with Dynare.  If not, see <https://www.gnu.org/licenses/>.

tf = all(o.data.data == 0);
end
