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function resu = df_colmeta(df)
%# function resu = df_colmeta(df)
%# Returns a new dataframe, initalised with the meta-information
%# about columns from the source, but with empty data
%% 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 2, 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/>.
resu = dataframe ();
resu.x_cnt(2) = df.x_cnt(2);
resu.x_name{2} = df.x_name{2};
resu.x_over{2} = df.x_over{2};
resu.x_type = df.x_type;
if (~isempty (df.x_ridx))
if (size (df.x_ridx, 2) >= resu.x_cnt(2)),
resu.x_ridx = df.x_ridx(1, :, :);
else
resu.x_ridx = df.x_ridx(1, 1, :);
end
end
%# init it with the right orientation
resu.x_data = cell (size (df.x_data));
resu.x_rep = cell (size (df.x_rep));
resu.x_src = df.x_src;
resu.x_cmt = df.x_cmt;
end
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