--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/classes/@ao/ifft.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,105 @@
+% IFFT overloads the ifft operator for Analysis objects.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: IFFT overloads the ifft operator for Analysis objects.
+%
+% CALL:        b = ifft(a, pl)
+%
+% <a href="matlab:utils.helper.displayMethodInfo('ao', 'ifft')">Parameters Description</a>
+%
+% VERSION:     $Id: ifft.m,v 1.31 2011/04/28 21:31:31 mauro Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function varargout = ifft(varargin)
+
+  % Check if this is a call for parameters
+  if utils.helper.isinfocall(varargin{:})
+    varargout{1} = getInfo(varargin{3});
+    return
+  end
+
+  import utils.const.*
+  utils.helper.msg(msg.PROC3, 'running %s/%s', mfilename('class'), mfilename);
+  
+  % Collect input variable names
+  in_names = cell(size(varargin));
+  for ii = 1:nargin,in_names{ii} = inputname(ii);end
+
+  % Collect all AOs and plists
+  [as, ao_invars] = utils.helper.collect_objects(varargin(:), 'ao', in_names);
+
+  % Decide on a deep copy or a modify
+  bs = copy(as, nargout);
+
+  % Apply defaults to plist
+  pl = applyDefaults(getDefaultPlist, varargin{:});
+
+  % two-sided or one?
+  type    = find(pl, 'type');
+  
+  % scale?
+  scale = utils.prog.yes2true(find(pl, 'scale'));
+
+  % Check input analysis object
+  for jj = 1:numel(bs)
+    
+    % call core method of the fft
+    bs(jj).ifft_core(type);
+    if scale
+        bs(jj) = bs(jj)./ao(plist('vals',1/as(jj).fs,'yunits','Hz^-1'));
+        bs(jj).simplifyYunits();
+    end
+    % Set name
+    bs(jj).name = sprintf('ifft(%s)', ao_invars{jj});    
+    % Add history
+    bs(jj).addHistory(getInfo('None'), pl, ao_invars, bs(jj).hist);
+    
+  end
+
+  % Set output
+  varargout = utils.helper.setoutputs(nargout, 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.sigproc, '$Id: ifft.m,v 1.31 2011/04/28 21:31:31 mauro Exp $', sets, pl);
+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();
+  
+  % Type
+  p = param({'type', 'Assume the data is symmetric or nonsymmetric.'}, {1, {'symmetric', 'nonsymmetric'}, paramValue.SINGLE});
+  pl.append(p);
+  
+  % Scale by sample rate?
+  p = param({'scale',['set to ''true'' to scale FFT by sampling rate to match '...
+      'amplitude in continuous domain. Only applicable to data with sampel rates.']},...
+      paramValue.FALSE_TRUE);  
+  pl.append(p);
+    
+end
+