--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/classes/@pzmodel/copy.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,46 @@
+% COPY makes a (deep) copy of the input pzmodel objects.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: COPY makes a deep copy of the input pzmodel objects.
+%
+% CALL:        b = copy(a, flag)
+%
+% INPUTS:      a    - input pzmodel object
+%              flag - 1: make a deep copy, 0: return copies of handles
+%
+% OUTPUTS:     b - copy of inputs
+%
+% This is a transparent function and adds no history.
+%
+% VERSION:     $Id: copy.m,v 1.16 2010/06/25 15:11:48 ingo Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function varargout = copy(old, deepcopy)
+  
+  if deepcopy
+    % Loop over input pzmodel objects
+    new = pzmodel.newarray(size(old));
+    obj = copy@ltpda_tf(new, old, 1);
+    
+    for kk=1:numel(old)
+      if ~isempty(old(kk).poles)
+        obj(kk).poles = copy(old(kk).poles,1);
+      else
+        obj(kk).poles = [];
+      end
+      if ~isempty(old(kk).zeros)
+        obj(kk).zeros = copy(old(kk).zeros,1);
+      else
+        obj(kk).zeros = [];
+      end
+      obj(kk).gain        = old(kk).gain;
+      obj(kk).delay       = old(kk).delay;
+    end
+  else
+    obj = old;
+  end
+  
+  varargout{1} = obj;
+end
+