diff -urN dataframe-1.1.0.orig/inst/@dataframe/private/strsplit.m dataframe-1.1.0/inst/@dataframe/private/strsplit.m
--- dataframe-1.1.0.orig/inst/@dataframe/private/strsplit.m	2015-04-22 19:07:16.000000000 -0400
+++ dataframe-1.1.0/inst/@dataframe/private/strsplit.m	1969-12-31 19:00:00.000000000 -0500
@@ -1,125 +0,0 @@
-## Copyright (C) 2009-2012 Jaroslav Hajek
-##
-## 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 3 of the License, 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, see
-## <http://www.gnu.org/licenses/>.
-##
-## FIXME: this file is here to avoid conflicts with new Octave versions. Matlab
-##        has recently added strplit function (used to exist in Octave only) but
-##        their syntax is not compatible with ours. Rather than timing the
-##        release of each octave forge package that used strsplit, a copy of the
-##        old version was placed as private. Once the new Octave version is
-##        released, this file can be removed, and the calls to strsplit fixed.
-
-## -*- texinfo -*-
-## @deftypefn  {Function File} {[@var{cstr}] =} strsplit (@var{s}, @var{sep})
-## @deftypefnx {Function File} {[@var{cstr}] =} strsplit (@var{s}, @var{sep}, @var{strip_empty})
-## Split the string @var{s} using one or more separators @var{sep} and return
-## a cell array of strings.  Consecutive separators and separators at
-## boundaries result in empty strings, unless @var{strip_empty} is true.
-## The default value of @var{strip_empty} is false.
-##
-## 2-D character arrays are split at separators and at the original column
-## boundaries.
-##
-## Example:
-##
-## @example
-## @group
-## strsplit ("a,b,c", ",")
-##       @result{}
-##           @{
-##             [1,1] = a
-##             [1,2] = b
-##             [1,3] = c
-##           @}
-##
-## strsplit (["a,b" ; "cde"], ",")
-##       @result{}
-##           @{
-##             [1,1] = a
-##             [1,2] = b
-##             [1,3] = cde
-##           @}
-## @end group
-## @end example
-## @seealso{strtok}
-## @end deftypefn
-
-function cstr = strsplit (s, sep, strip_empty = false)
-
-  if (nargin < 2 || nargin > 3)
-    print_usage ();
-  elseif (! ischar (s) || ! ischar (sep))
-    error ("strsplit: S and SEP must be string values");
-  elseif (! isscalar (strip_empty))
-    error ("strsplit: STRIP_EMPTY must be a scalar value");
-  endif
-
-  if (isempty (s))
-    cstr = cell (size (s));
-  else
-    if (rows (s) > 1)
-      ## For 2-D arrays, add separator character at line boundaries
-      ## and transform to single string
-      s(:, end+1) = sep(1);
-      s = reshape (s.', 1, numel (s));
-      s(end) = []; 
-    endif
-
-    ## Split s according to delimiter
-    if (isscalar (sep))
-      ## Single separator
-      idx = find (s == sep);
-    else
-      ## Multiple separators
-      idx = strchr (s, sep);
-    endif
-
-    ## Get substring lengths.
-    if (isempty (idx))
-      strlens = length (s);
-    else
-      strlens = [idx(1)-1, diff(idx)-1, numel(s)-idx(end)];
-    endif
-    ## Remove separators.
-    s(idx) = [];
-    if (strip_empty)
-      ## Omit zero lengths.
-      strlens = strlens(strlens != 0);
-    endif
-
-    ## Convert!
-    cstr = mat2cell (s, 1, strlens);
-  endif
-
-endfunction
-
-
-%!assert (strsplit ("road to hell", " "), {"road", "to", "hell"})
-%!assert (strsplit ("road to^hell", " ^"), {"road", "to", "hell"})
-%!assert (strsplit ("road   to--hell", " -", true), {"road", "to", "hell"})
-%!assert (strsplit (["a,bc";",de"], ","), {"a", "bc", char(ones(1,0)), "de "})
-%!assert (strsplit (["a,bc";",de"], ",", true), {"a", "bc", "de "})
-%!assert (strsplit (["a,bc";",de"], ", ", true), {"a", "bc", "de"})
-
-%% Test input validation
-%!error strsplit ()
-%!error strsplit ("abc")
-%!error strsplit ("abc", "b", true, 4)
-%!error <S and SEP must be string values> strsplit (123, "b")
-%!error <S and SEP must be string values> strsplit ("abc", 1)
-%!error <STRIP_EMPTY must be a scalar value> strsplit ("abc", "def", ones (3,3))
-