--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/classes/@ao/zeropad.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,154 @@
+% ZEROPAD zero pads the input data series.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: ZEROPAD zero pads the input data series.
+%
+% CALL:        b = zeropad(a, pl)
+%
+% <a href="matlab:utils.helper.displayMethodInfo('ao', 'zeropad')">Parameters Description</a>
+%
+% VERSION:     $Id: zeropad.m,v 1.28 2011/04/08 08:56:15 hewitson Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function varargout = zeropad(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);
+  pl              = utils.helper.collect_objects(varargin(:), 'plist', in_names);
+
+  %%% Decide on a deep copy or a modify
+  bs = copy(as, nargout);
+
+  % combine plists
+  pl = parse(pl, getDefaultPlist());
+  
+  % Extract necessary parameters
+  Factor = find(pl, 'Factor');
+  N      = find(pl, 'N');
+  pos    = find(pl, 'position');
+  
+  if isempty(Factor) && isempty(N)
+    error('### Specify either a padding Factor, or a number of samples.');
+  end
+
+  % Loop over input AOs
+  for j=1:numel(bs)
+    if ~isa(bs(j).data, 'tsdata')
+      error('Zero padding only works on time-series. AO %s is not a time-series.', ao_invars{j});
+    else
+      % Check the time-series is evenly samples
+      if ~isempty(bs(j).data.x)
+        error('### Zero padding only makes sense on evenly sampled time-series. Resample first.');
+      end
+      if isempty(N)
+        if Factor < 2
+          error('### Padding factor must be >= 2')
+        end
+        if strcmpi(pos, 'pre')
+          bs(j).data.setY([repmat(zeros(size(bs(j).data.getY)), Factor-1, 1); bs(j).data.getY]);
+        elseif strcmpi(pos, 'post')
+          bs(j).data.setY([bs(j).data.getY; repmat(zeros(size(bs(j).data.getY)), Factor-1, 1)]);
+        else 
+          error('Unknown ''position'' to pad. Choose either ''pre'' or ''post'' for the ''position'' value.');
+        end
+      else
+        if N > 0
+          if strcmpi(pos, 'pre')
+            bs(j).data.setY([zeros(N,1); bs(j).data.getY]);
+          elseif strcmpi(pos, 'post')
+            bs(j).data.setY([bs(j).data.getY; zeros(N,1)]);
+          else
+            error('Unknown ''position'' to pad. Choose either ''pre'' or ''post'' for the ''position'' value.');
+          end
+        else
+          error('### Number of samples to pad must be > 0');
+        end
+      end
+      % Set name
+      bs(j).name = sprintf('zeropad(%s)', ao_invars{j});
+      % Correct Nsecs
+      bs(j).data.fixNsecs;
+      % Add history
+      bs(j).addHistory(getInfo('None'), pl, ao_invars(j), bs(j).hist);
+      % clear errors
+      bs(j).clearErrors;
+    end
+  end
+
+  % Set output
+  if nargout == numel(bs)
+    % List of outputs
+    for ii = 1:numel(bs)
+      varargout{ii} = bs(ii);
+    end
+  else
+    % Single output
+    varargout{1} = bs;
+  end
+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: zeropad.m,v 1.28 2011/04/08 08:56:15 hewitson Exp $', sets, pl);
+end
+
+%--------------------------------------------------------------------------
+% Get Default Plist
+%--------------------------------------------------------------------------
+function plout = getDefaultPlist()
+  persistent pl;  
+  if exist('pl', 'var')==0 || isempty(pl)
+    pl = buildplist();
+  end
+  plout = pl;  
+end
+
+function pl = buildplist()
+  pl = plist();
+  
+  % Factor
+  p = param({'Factor', 'Pad to <Factor> times the input data length.'}, paramValue.DOUBLE_VALUE(2));
+  pl.append(p);
+  
+  % N
+  p = param({'N', 'Pad with N zero samples.'}, paramValue.EMPTY_DOUBLE);
+  pl.append(p);
+  
+  % Position
+  p = param({'Position', 'Where to pad: before or after.'}, {2, {'pre', 'post'}, paramValue.SINGLE});
+  pl.append(p);
+  
+  
+end
+% END
+
+
+% PARAMETERS: 'Factor'  - Pad to <Factor> times the input data length
+%                         [default: 2]
+%           or
+%             'N'       - Pad with N zero samples
+