--- /dev/null
+function resu = df_mapper(func, df, varargin)
+ %# resu = df_mapper(func, df)
+ %# small interface to iterate some func over the elements of a dataframe.
+
+ %% Copyright (C) 2009-2012 Pascal Dupuis <Pascal.Dupuis@uclouvain.be>
+ %%
+ %% This file is part of Octave.
+ %%
+ %% Octave 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.
+ %%
+ %% Octave 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 Octave; see the file COPYING. If not,
+ %% write to the Free Software Foundation, 51 Franklin Street -
+ %% Fifth Floor, Boston, MA 02110-1301, USA.
+
+ %#
+ %# $Id: df_mapper.m 9585 2012-02-05 15:32:46Z cdemills $
+ %#
+
+ resu = df_allmeta(df);
+ resu._data = cellfun(@(x) feval(func, x, varargin{:}), df._data, \
+ "UniformOutput", false);
+ resu._rep = df._rep; %# things didn't change
+ resu._type = cellfun(@(x) class(x(1)), resu._data, "UniformOutput", false);
+
+ resu = df_thirddim(resu);
+
+endfunction