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## Copyright (C) 1996 John W. Eaton
##
## 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, 59 Temple Place - Suite 330, Boston, MA
## 02111-1307, USA.
## usage: reshape (a, m, n)
##
## Form an m x n matrix from the elements of a (taken in Fortran's
## column major ordering).
##
## See also: `:', do_fortran_indexing
## Author: jwe
function retval = reshape (a, m, n)
if (nargin == 2 && prod (size (m)) == 2)
n = m(2);
m = m(1);
nargin = 3;
endif
if (nargin == 3)
[nr, nc] = size (a);
if (nr * nc == m * n)
dfi = do_fortran_indexing;
istno = implicit_str_to_num_ok;
unwind_protect
do_fortran_indexing = 1;
implicit_str_to_num_ok = 1;
retval = zeros (m, n);
retval (:) = a;
if (isstr (a))
retval = setstr (retval);
endif
unwind_protect_cleanup
do_fortran_indexing = dfi;
implicit_str_to_num_ok = istno;
end_unwind_protect
else
error ("reshape: sizes must match");
endif
else
usage ("reshape (a, m, n) or reshape (a, size (b))");
endif
endfunction
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