/usr/share/octave/packages/statistics-1.2.3/casewrite.m is in octave-statistics 1.2.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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##
## This program 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.
##
## This program 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 program; if not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {} casewrite (@var{strmat}, @var{filename})
## Write case names to an ascii file.
##
## Essentially, this writes all lines from @var{strmat} to
## @var{filename} (after deblanking them).
## @seealso{caseread, tblread, tblwrite, csv2cell, cell2csv, fopen}
## @end deftypefn
## Author: Bill Denney <bill@denney.ws>
## Description: Write strings from a file
function names = casewrite (s="", f="")
## Check arguments
if nargin != 2
print_usage ();
endif
if isempty (f)
## FIXME: open a file dialog box in this case when a file dialog box
## becomes available
error ("casewrite: filename must be given")
endif
if isempty (s)
error ("casewrite: strmat must be given")
elseif ! ischar (s)
error ("casewrite: strmat must be a character matrix")
elseif ndims (s) != 2
error ("casewrite: strmat must be two dimensional")
endif
[fid msg] = fopen (f, "wt");
if fid < 0 || (! isempty (msg))
error ("casewrite: cannot open %s for writing: %s", f, msg);
endif
for i = 1:rows (s)
status = fputs (fid, sprintf ("%s\n", deblank (s(i,:))));
endfor
if (fclose (fid) < 0)
error ("casewrite: error closing f")
endif
endfunction
## Tests
%!shared s
%! s = ["a ";"bcd";"ef "];
%!test
%! casewrite (s, "casewrite.dat")
%! assert(caseread ("casewrite.dat"), s);
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