--- /dev/null
+## Copyright (C) 1993-2012 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} {} polar (@var{theta}, @var{rho})
+## @deftypefnx {Function File} {} polar (@var{theta}, @var{rho}, @var{fmt})
+## @deftypefnx {Function File} {} polar (@var{h}, @dots{})
+## @deftypefnx {Function File} {@var{h} =} polar (@dots{})
+## Create a two-dimensional plot from polar coordinates @var{theta} and
+## @var{rho}.
+##
+## The optional argument @var{fmt} specifies the line format.
+##
+## The optional return value @var{h} is a graphics handle to the created plot.
+##
+## @seealso{plot}
+## @end deftypefn
+
+## Author: jwe
+
+function retval = polar (varargin)
+
+ [h, varargin, nargs] = __plt_get_axis_arg__ ("polar", varargin{:});
+
+ if (nargs < 1)
+ print_usage();
+ endif
+
+ oldh = gca ();
+ unwind_protect
+ axes (h);
+ newplot ();
+
+ if (nargs == 3)
+ if (! ischar (varargin{3}))
+ error ("polar: third argument must be a string");
+ endif
+ tmp = __plr2__ (h, varargin{:});
+ maxr = max (varargin {2} (:));
+ elseif (nargs == 2)
+ if (ischar (varargin{2}))
+ tmp = __plr1__ (h, varargin{:});
+ if (iscomplex(varargin{1}))
+ maxr = max (imag(varargin{1})(:));
+ else
+ maxr = max (varargin{1}(:));
+ endif
+ else
+ fmt = "";
+ tmp = __plr2__ (h, varargin{:}, fmt);
+ maxr = max (varargin {2} (:));
+ endif
+ elseif (nargs == 1)
+ fmt = "";
+ tmp = __plr1__ (h, varargin{:}, fmt);
+ if (iscomplex(varargin{1}))
+ maxr = max (imag(varargin{1})(:));
+ else
+ maxr = max (varargin{1}(:));
+ endif
+ else
+ print_usage ();
+ endif
+
+ set (h, "xlim", [-maxr, maxr], "ylim", [-maxr, maxr],
+ "xaxislocation", "zero", "yaxislocation", "zero",
+ "plotboxaspectratio", [1, 1, 1]);
+
+ if (nargout > 0)
+ retval = tmp;
+ endif
+ unwind_protect_cleanup
+ axes (oldh);
+ end_unwind_protect
+
+endfunction
+
+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
+
+function retval = __plr2__ (h, theta, rho, fmt)
+
+ if (nargin != 4)
+ print_usage ();
+ endif
+
+ if (any (imag (theta)))
+ theta = real (theta);
+ endif
+
+ if (any (imag (rho)))
+ rho = real (rho);
+ endif
+
+ if (isscalar (theta))
+ if (isscalar (rho))
+ x = rho * cos (theta);
+ y = rho * sin (theta);
+ retval = __plt__ ("polar", h, x, y, fmt);
+ else
+ error ("__plr2__: invalid data for plotting");
+ endif
+ elseif (isvector (theta))
+ if (isvector (rho))
+ if (length (theta) != length (rho))
+ error ("__plr2__: vector lengths must match");
+ endif
+ if (rows (rho) == 1)
+ rho = rho';
+ endif
+ if (rows (theta) == 1)
+ theta = theta';
+ endif
+ x = rho .* cos (theta);
+ y = rho .* sin (theta);
+ retval = __plt__ ("polar", h, x, y, fmt);
+ elseif (ismatrix (rho))
+ [t_nr, t_nc] = size (theta);
+ if (t_nr == 1)
+ theta = theta';
+ tmp = t_nr;
+ t_nr = t_nc;
+ t_nc = tmp;
+ endif
+ [r_nr, r_nc] = size (rho);
+ if (t_nr != r_nr)
+ rho = rho';
+ tmp = r_nr;
+ r_nr = r_nc;
+ r_nc = tmp;
+ endif
+ if (t_nr != r_nr)
+ error ("__plr2__: vector and matrix sizes must match");
+ endif
+ x = diag (cos (theta)) * rho;
+ y = diag (sin (theta)) * rho;
+ retval = __plt__ ("polar", h, x, y, fmt);
+ else
+ error ("__plr2__: invalid data for plotting");
+ endif
+ elseif (ismatrix (theta))
+ if (isvector (rho))
+ [r_nr, r_nc] = size (rho);
+ if (r_nr == 1)
+ rho = rho';
+ tmp = r_nr;
+ r_nr = r_nc;
+ r_nc = tmp;
+ endif
+ [t_nr, t_nc] = size (theta);
+ if (r_nr != t_nr)
+ theta = theta';
+ tmp = t_nr;
+ t_nr = t_nc;
+ t_nc = tmp;
+ endif
+ if (r_nr != t_nr)
+ error ("__plr2__: vector and matrix sizes must match");
+ endif
+ diag_r = diag (rho);
+ x = diag_r * cos (theta);
+ y = diag_r * sin (theta);
+ retval = __plt__ ("polar", h, x, y, fmt);
+ elseif (ismatrix (rho))
+ if (! size_equal (rho, theta))
+ error ("__plr2__: matrix dimensions must match");
+ endif
+ x = rho .* cos (theta);
+ y = rho .* sin (theta);
+ retval = __plt__ ("polar", h, x, y, fmt);
+ else
+ error ("__plr2__: invalid data for plotting");
+ endif
+ else
+ error ("__plr2__: invalid data for plotting");
+ endif
+
+endfunction
+
+
+%!demo
+%! clf
+%! theta = linspace (0, 2*pi, 1000);
+%! rho = sin (7*theta);
+%! polar (theta, rho);
+
+%!demo
+%! clf
+%! theta = linspace (0, 10*pi, 1000);
+%! rho = sin (5/4*theta);
+%! polar (theta, rho);
+
git://git.creatis.insa-lyon.fr / CreaPhase.git / blobdiff