%% Copyright (c) 2011, INRA
%% 2004-2011, David Legland <david.legland@grignon.inra.fr>
%% 2011 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
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%% -*- texinfo -*-
%% @deftypefn {Function File} {@var{h} = } drawPoint (@var{x}, @var{y})
%% @deftypefnx {Function File} {@var{h} = } drawPoint (@var{coord})
%% @deftypefnx {Function File} {@var{h} = } drawPoint (@dots{}, @var{opt})
%% Draw the point on the axis.
%
%   Draws points defined by coordinates @var{x} and @var{y}Y.
%   @var{x} and @var{y} should be array the same size. Coordinates can be 
%   packed coordinates in a single [N*2] array @var{coord}. Options @var{opt}
%   are passed to the @code{plot} function.
%
%   @seealso{points2d, clipPoints}
%
%% @end deftypefn

function varargout = drawPoint(varargin)

  % process input arguments
  var = varargin{1};
  if size(var, 2)==1
      % points stored in separate arrays
      px = varargin{1};
      py = varargin{2};
      varargin(1:2) = [];
  else
      % points packed in one array
      px = var(:, 1);
      py = var(:, 2);
      varargin(1) = [];
  end

  % ensure we have column vectors
  px = px(:);
  py = py(:);

  % default drawing options, but keep specified options if it has the form of
  % a bundled string
  if length(varargin)~=1
      varargin = [{'linestyle', 'none', 'marker', 'o', 'color', 'b'}, varargin];
  end

  % plot the points, using specified drawing options
  h = plot(px(:), py(:), varargin{:});

  % process output arguments
  if nargout>0
      varargout{1}=h;
  end

endfunction

%!demo
%!   drawPoint(10, 10);

%!demo
%!   t = linspace(0, 2*pi, 20)';
%!   drawPoint([5*cos(t)+10 3*sin(t)+10], 'r+');

