--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/classes/@pzmodel/char.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,100 @@
+% CHAR convert a pzmodel object into a string.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: CHAR convert a pzmodel object into a string.
+%
+% CALL:        string = char(pzmodel)
+%
+% <a href="matlab:utils.helper.displayMethodInfo('pzmodel', 'char')">Parameters Description</a>
+%
+% VERSION:     $Id: char.m,v 1.18 2011/04/08 08:56:32 hewitson Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function varargout = char(varargin)
+  
+  %%% Check if this is a call for parameters
+  if utils.helper.isinfocall(varargin{:})
+    varargout{1} = getInfo(varargin{3});
+    return
+  end
+  
+  objs = utils.helper.collect_objects(varargin(:), 'pzmodel');
+  
+  pstr = '';
+  
+  for ii = 1:numel(objs)
+    if numel(objs(ii).poles(:))==0||numel(objs(ii).zeros(:))==0||numel(objs(ii).gain(:))==0
+      pole='no pole';
+      zero='no zero';
+      K='no gain';
+    else
+      poles= vertcat(objs(ii).poles(:).ri);
+      zeros= vertcat(objs(ii).zeros(:).ri);
+      K=utils.math.getk(zeros,poles,objs(ii).gain);
+      pole=num2str(poles(1));
+      zero=num2str(zeros(1));
+      for i=2:numel(poles)
+        pole= [pole, ';', num2str(poles(i))];
+      end
+      for i=2:numel(zeros)
+        zero= [zero,  ';' , num2str(zeros(i))];
+      end
+    end
+    pstr = [pstr 'pzmodel(g:' num2str(K) ' p:' pole ' z:' zero '), '];
+  end
+  
+  varargout{1} = pstr(1:end-2);
+end
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%                               Local Functions                               %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% FUNCTION:    getInfo
+%
+% DESCRIPTION: Get Info Object
+%
+% HISTORY:     11-07-07 M Hewitson
+%                Creation.
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function ii = getInfo(varargin)
+  if nargin == 1 && strcmpi(varargin{1}, 'None')
+    sets = {};
+    pl   = [];
+  else
+    sets = {'Default'};
+    pl   = getDefaultPlist;
+  end
+  % Build info object
+  ii = minfo(mfilename, 'pzmodel', 'ltpda', utils.const.categories.output, '$Id: char.m,v 1.18 2011/04/08 08:56:32 hewitson Exp $', sets, pl);
+  ii.setModifier(false);
+end
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% FUNCTION:    getDefaultPlist
+%
+% DESCRIPTION: Get Default Plist
+%
+% HISTORY:     11-07-07 M Hewitson
+%                Creation.
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function plout = getDefaultPlist()
+  persistent pl;  
+  if exist('pl', 'var')==0 || isempty(pl)
+    pl = buildplist();
+  end
+  plout = pl;  
+end
+
+function pl = buildplist()
+  pl = plist.EMPTY_PLIST;
+end
+