## Copyright (C) 1994, 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/>.

## Undocumented internal function.

## Author: jwe

function retval = __plr1__ (h, theta, fmt)

  if (nargin != 3)
    print_usage ();
  endif

  [nr, nc] = size (theta);
  if (nr == 1)
    theta = theta';
    tmp = nr;
    nr = nc;
    nc = tmp;
  endif
  theta_i = imag (theta);
  if (any (theta_i))
    rho = theta_i;
    theta = real (theta);
  else
    rho = theta;
    theta = (1:nr)';
  endif

  retval = __plr2__ (h, theta, rho, fmt);

endfunction