--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/classes/@ao/hypot.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,107 @@
+% HYPOT overloads robust computation of the square root of the sum of squares for AOs.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: HYPOT overloads robust computation of the square root of the
+%              sum of squares for Analysis objects.
+%
+% CALL:        ao_out = hypot(ao_in);
+%              ao_out = hypot(ao_in, pl);
+%
+% REMARK:      The data-object of the output AO is the same as the
+%              data-object of the first AO input. The result of HYPOT will
+%              be copied to the y values of this data-object if this is
+%              called without an output.
+%
+% <a href="matlab:utils.helper.displayMethodInfo('ao', 'hypot')">Parameters Description</a>
+%
+% VERSION:     $Id: hypot.m,v 1.13 2011/04/08 08:56:12 hewitson Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function varargout = hypot(varargin)
+  
+  callerIsMethod = utils.helper.callerIsMethod;
+  
+  operatorName   = 'hypot';
+  operatorSymbol = 'hypot';
+  
+  % Check if this is a call for parameters
+  if utils.helper.isinfocall(varargin{:})
+    varargout{1} = getInfo(varargin{3});
+    return
+  end
+
+  % Collect input aos, plists and ao variable names
+  in_names = cell(size(varargin));
+  for ii = 1:nargin,in_names{ii} = inputname(ii);end
+
+  % Collect all AOs
+  [as, ao_invars] = utils.helper.collect_objects(varargin(:), 'ao', in_names);
+  pl              = utils.helper.collect_objects(varargin(:), 'plist', in_names);
+  
+  % Get default parameters
+  pl = parse(pl, getDefaultPlist);
+
+  % Check input arguments number
+  if numel(as) ~= 2
+    error ('### Incorrect inputs for %s. Please enter 2 AOs', operatorName);
+  end
+  if nargout == 0
+    error('### %s cannot be used as a modifier. Please give an output variable.', operatorName);
+  end
+  
+  % Go for a deep copy
+  bs = copy(as, true);
+  
+  % Settings
+  if callerIsMethod
+    infoObj = [];
+    pl = plist;
+  else
+    infoObj = getInfo();
+    pl = getDefaultPlist;
+  end
+  
+  % Apply method
+  bs = bs.applyoperator(callerIsMethod, ao_invars, operatorName, operatorSymbol, pl, infoObj);
+  % clear errors
+  bs.clearErrors;
+
+  % Set output
+  varargout{1} = bs;
+end
+
+%--------------------------------------------------------------------------
+% Get Info Object
+%--------------------------------------------------------------------------
+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, 'ao', 'ltpda', utils.const.categories.op, '$Id: hypot.m,v 1.13 2011/04/08 08:56:12 hewitson Exp $', sets, pl);
+  ii.setModifier(false);
+  ii.setArgsmin(2);
+end
+
+%--------------------------------------------------------------------------
+% Get Default Plist
+%--------------------------------------------------------------------------
+function plout = getDefaultPlist()
+  persistent pl;  
+  if ~exist('pl', 'var') || isempty(pl)
+    pl = buildplist();
+  end
+  plout = pl;  
+end
+
+function pl = buildplist()
+  pl = plist({'axis', 'The axis on which to compute the sqrt of the sum of the squares.'},  ...
+    {2, {'x', 'y', 'xy'}, paramValue.SINGLE});
+
+end
+