--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/classes/@ao/sumjoin.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,156 @@
+% SUMJOIN sums time-series signals togther
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: SUMJOIN sums time-series signals togther. The start time of
+%              each signal is taken in to account when summing. The signals
+%              are zero-padded at non-overlapping times.
+%
+%         s1:   |. . + + | 0 0 0 0 0
+%         s2:    0 0 | + + + + | 0 0
+%         s3:    0 0 0 | + + + + . |
+%
+% CALL:        b = sumjoin(a1, a2, pl)
+%
+% EXAMPLES:
+%
+% a1 = ao(plist('tsfcn', 'randn(size(t))', 'fs', 10, 'nsecs', 10, ...
+%               't0', 10000))
+% a2 = ao(plist('tsfcn', 't', 'fs', 10, 'nsecs', 15, 't0', 15000))
+% b  = sumjoin(a1,a2);
+% iplot(a1,a2,b);
+%
+% <a href="matlab:utils.helper.displayMethodInfo('ao', 'sumjoin')">Parameters Description</a>
+%
+% VERSION:     $Id: sumjoin.m,v 1.19 2011/04/08 08:56:12 hewitson Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function varargout = sumjoin(varargin)
+  
+  % Check if this is a call for parameters
+  if utils.helper.isinfocall(varargin{:})
+    varargout{1} = getInfo(varargin{3});
+    return
+  end
+  
+  %   if nargout == 0
+  %     error('### join cannot be used as a modifier. Please give an output variable.');
+  %   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
+  [as, ao_invars] = utils.helper.collect_objects(varargin(:), 'ao', in_names);
+  pl              = utils.helper.collect_objects(varargin(:), 'plist', in_names);
+  
+  % Copy inputs
+  bs = copy(as, nargout);
+  
+  % Combine plists
+  pl = parse(pl, getDefaultPlist);
+  
+  % loop over AOs to get maximum and minimum end time
+  tEnd    = 0;
+  tStart  = 1e20;
+  fs      = bs(1).data.fs;
+  inhists = [];
+  for j=1:numel(bs)
+    % Only get the data type we want
+    if isa(bs(j).data, 'tsdata')
+      % check sample rate
+      if bs(j).data.fs ~= fs
+        error('### All input time-series must have the same sample rate.');
+      end
+      % check sampling
+      if ~bs(j).data.evenly()
+        error('### This method only works on regularly sampled time-series.');
+      end
+      % get start and stop time
+      x1 = bs(j).data.getX(1);
+      ts = x1 + bs(j).data.t0.utc_epoch_milli/1000;
+      te = bs(j).data.nsecs + ts;
+      if te > tEnd
+        tEnd = te;
+      end
+      if ts < tStart
+        tStart = ts;
+      end
+      % store input history
+      inhists = [inhists bs(j).hist];
+    else
+      error('### It is not a time-series', bs(j).name);
+    end
+  end
+  
+  % clear errors
+  bs.clearErrors;
+
+  % Zero pad and sum each signal
+  name = 'sumjoin(';
+  yall = zeros((tEnd - tStart)*fs,1);
+  for kk=1:numel(bs)
+    if isa(bs(kk).data, 'tsdata')
+      
+      name = sprintf('%s%s, ', name, ao_invars{kk});
+      
+      x1   = bs(kk).x(1)   + bs(kk).t0.utc_epoch_milli/1000;
+      xn   = bs(kk).x(end) + 1/fs;
+      post = zeros((tEnd - xn - x1)*fs,1);
+      pre  = zeros((x1 - tStart)*fs,1);
+      y    = [pre; bs(kk).y; post];
+      yall = yall + y;
+    end
+  end
+  xall = linspace(0, (tEnd - tStart) -1/fs, (tEnd - tStart)*fs)';
+  name = [name(1:end-2) ')'];
+  
+  % Fix up this AO
+  out = bs(1);
+  out.data.setXY(xall, yall);
+  out.data.fixNsecs;
+  out.data.collapseX;
+  out.name = name;
+  out.data.setT0(time(tStart));
+  out.hist = [];
+  out.addHistory(getInfo('None'), pl, ao_invars, inhists);
+  
+  % Set output
+  varargout{1} = out;
+  
+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: sumjoin.m,v 1.19 2011/04/08 08:56:12 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.EMPTY_PLIST;
+end
+