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function resu = char(df, varargin)
%% Copyright (C) 2009-2017 Pascal Dupuis <cdemills@gmail.com>
%%
%% This file is part of the dataframe package for Octave.
%%
%% This package 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, or (at your option) any later version.
%%
%% This package 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 this package; see the file COPYING. If not,
%% see <http://www.gnu.org/licenses/>.
[count1, count2, count3] = size (df);
resu = '';
for indk = (1:count3)
%# iterate on a column by column basis
for indj = (1:count2)
if (length (df.x_rep{indj}) >= indk)
dummy = char (df.x_data{indj}(:, df.x_rep{indj}(indk)));
if (isempty (dummy))
dummy = repmat (' ', [count1 1]);
end
resu = strvcat (resu, dummy);
else
resu = strvcat (resu, repmat ('NA', [count1 1]));
end
end
end
if (nargin > 1)
resu = vertcat (resu, varargin{:});
end
end
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