--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/classes/@ao/diag.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,98 @@
+% DIAG overloads the diagonal operator for analysis objects.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: DIAG overloads the diagonal operator for analysis objects.
+%
+% CALL:        b = diag (a)    % only with data = cdata
+%              b = diag (a, pl)
+%
+% INPUTS:      a  -  input analysis object
+%              pl - parameter list
+%
+% OUTPUTS:     b  - output analysis object
+%
+% <a href="matlab:utils.helper.displayMethodInfo('ao', 'diag')">Parameters Description</a>
+%
+% VERSION:     $Id: diag.m,v 1.43 2011/04/19 18:48:11 ingo Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function varargout = diag(varargin)
+  
+  % Check if the method was called by another method
+  callerIsMethod = utils.helper.callerIsMethod;
+  
+  % Settings
+  operatorName = 'diag';
+  dxFcn = [];
+  
+  if callerIsMethod
+    in_names = {};
+  else
+    % Collect input variable names
+    in_names = cell(size(varargin));
+    for ii = 1:nargin,in_names{ii} = inputname(ii);end
+    
+    % Check if this is a call for the minfo object
+    if utils.helper.isinfocall(varargin{:})
+      varargout{1} = getInfo(varargin{3});
+      return
+    end
+    
+  end
+  
+  % Here we are forced to collect objects so that we can check that each ao
+  % is the correct type and shape for doing det.
+  [as, dummy, rest] = utils.helper.collect_objects(varargin, 'ao', in_names);
+  
+  % Check for the correct data objects: Throw an error for data2D objects.
+  as.checkDataType('data2D');
+  
+  % Check that the data of the AOs is a square matrix
+  for ii=1:numel(as)
+    if size(as(ii).data.y,1) ~= size(as(ii).data.y,2)
+      error('### The y data must be a square matrix.')
+    end
+  end
+  
+  copyObjects = nargout>0;
+  
+  % Apply method to all AOs
+  [out, pl] = ao.applymethod(copyObjects, callerIsMethod, in_names, operatorName, dxFcn, @getInfo, @getDefaultPlist, varargin{:});
+  
+  % Clear errors
+  out.clearErrors(pl);
+  
+  % set outputs
+  varargout = utils.helper.setoutputs(nargout, out);
+  
+end
+
+%--------------------------------------------------------------------------
+% Get Info Object
+%--------------------------------------------------------------------------
+function ii = getInfo(varargin)
+  
+  ii = minfo.getInfoAxis(mfilename, @getDefaultPlist, varargin);
+end
+
+%--------------------------------------------------------------------------
+% Get Default Plist
+%--------------------------------------------------------------------------
+
+function plout = getDefaultPlist(set)
+  persistent pl;
+  persistent lastset;
+  if ~exist('pl', 'var') || isempty(pl) || ~strcmp(lastset, set)
+    pl = buildplist(set);
+    lastset = set;
+  end
+  plout = pl;
+end
+
+function plout = buildplist(varargin)
+  plout = plist.getDefaultAxisPlist(varargin{:});
+  plout.remove('option');
+  p = param({'option', 'See help on MATLAB''s <a href="matlab:doc(''diag'')">diag</a>.'}, {1, {0}, paramValue.OPTIONAL});
+  plout.append(p);
+end