### 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: polar (theta, rho, fmt)
##
## Make a 2D plot given polar the coordinates theta and rho.
##
## The optional third argument specifies the line type.
##
## See also: plot, semilogx, semilogy, loglog, mesh, contour, bar,
##           stairs, gplot, gsplot, replot, xlabel, ylabel, title 

function polar (x1, x2, fmt)

  set nologscale;
  set nopolar;

  if (nargin == 3)
    if (isstr (fmt))
      fmt = plot_opt ("polar", fmt);
    else
      error ("polar: third argument must be a string");
    endif
    polar_int_2 (x1, x2, fmt);
  elseif (nargin == 2)
    if (isstr (x2))
      fmt = plot_opt ("polar", x2);
      polar_int_1 (x1, fmt);
    else
      fmt = "";
      polar_int_2 (x1, x2, fmt);
    endif
  elseif (nargin == 1)
    fmt = "";
    polar_int_1 (x1, fmt);
  else
    usage ("polar (theta, rho, fmt)");
  endif

endfunction