## Copyright (C) 1995, 1996, 1997, 2000, 2005, 2006, 2007 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 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/>.

## -*- texinfo -*-
## @deftypefn {Function File} {} polyder (@var{c})
## @deftypefnx {Function File} {[@var{q}] =} polyder (@var{b}, @var{a})
## @deftypefnx {Function File} {[@var{q}, @var{r}] =} polyder (@var{b}, @var{a})
## See polyderiv.
## @end deftypefn

## Author: John W. Eaton

function [q, r] = polyder (p, a)

  if (nargin == 1)
    q = polyderiv (p);
  elseif (nargin == 2)
    if (nargout == 2)
      [q, r] = polyderiv (p, a);
    else
      q = polyderiv (p, a);
    endif
  else
    print_usage ();
  endif

endfunction