--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/classes/@ao/find.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,179 @@
+% FIND particular samples that satisfy the input query and return a new AO.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: FIND particular samples that satisfy the input query and return a new AO.
+%
+% CALL:        b = find(a, 'x > 10 & x < 100')
+%              b = find(a, plist)
+%
+% PROCINFO:    The selected indexes are stored in the procinfo of the
+%              output AO. You can get this indexes with:
+%              b.procinfo.find('index')
+%
+% <a href="matlab:utils.helper.displayMethodInfo('ao', 'find')">Parameters Description</a>
+%
+% VERSION:     $Id: find.m,v 1.47 2011/10/05 12:04:25 ingo Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function varargout = find(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, pl_invars, rest] = 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());
+
+  % initialise queries
+  queries = '';
+  % extract any from inputs
+  for j=1:numel(rest)
+    if ischar(rest{j})
+      queries = [queries ' & ' rest{j}];
+    end
+  end
+
+  % Get sample selection from plist
+  queries = [queries ' & ' find(pl, 'query')];
+
+  % We may have pre or trailing '&' now
+  queries = strtrim(queries);
+  if queries(1) == '&'
+    queries = queries(2:end);
+  end
+  if queries(end) == '&'
+    queries = queries(1:end-1);
+  end
+  
+  % store for history
+  queries = strtrim(queries);
+  pl.pset('query', queries);
+
+  % Loop over input AOs
+  for j=1:numel(bs)
+    
+    % The user uses the variables x and y so we need
+    % to put them in the workspace.
+    clear x
+    if ~isa(bs(j).data, 'cdata')
+      x = bs(j).data.getX;
+    end
+    y = bs(j).data.getY;
+
+    idx = [];
+    cmd = sprintf('idx = find(%s);', queries);
+    try
+      eval(cmd);
+    catch ME
+      error('%s\n\n### please use x or y for the queries.',ME.message);
+    end
+
+    % set data
+    if ~isa(bs(j).data, 'cdata')
+      %%% tsdata, fsdata, xydata
+      bs(j).data.setXY(x(idx), y(idx));
+      
+      % Set 'dx' and 'dy' and 'enbw'
+      if numel(bs(j).data.dx) > 1
+        bs(j).data.setDx(bs(j).data.dx(idx));
+      end
+      if numel(bs(j).data.dy) > 1
+        bs(j).data.setDy(bs(j).data.dy(idx));
+      end
+      if isprop(bs(j).data, 'enbw')
+        if numel(bs(j).data.enbw) > 1
+          bs(j).data.setEnbw(bs(j).data.enbw(idx));
+        end
+      end
+      
+    else
+      %%% cdata
+      bs(j).data.setY(y(idx));
+      if numel(bs(j).data.dy) > 1
+        bs(j).data.setY(bs(j).data.dy(idx));
+      end
+    end
+
+    %%% Set special properties for 'tsdata' objects
+    if isa(bs(j).data, 'tsdata')
+      % Set the toffset to zero because the x-vector includes the toffset
+      bs(j).data.setToffset(0);
+      
+      % Check fs and see if is x evenly sampled
+      [fs,t0,fitted] = tsdata.fitfs(x(idx));
+      if fitted
+        bs(j).data.setFs(fs);
+        bs(j).data.fixNsecs();
+      else
+        % drop x
+        bs(j).data.collapseX;
+      end
+    end
+    
+    % set name
+    bs(j).name = sprintf('find(%s)', ao_invars{j});
+    % add history
+    bs(j).addHistory(getInfo('None'), pl, ao_invars(j), bs(j).hist);
+    bs(j).procinfo = plist('index', idx);
+  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 = {};
+    pls  = [];
+  else
+    sets = {'Default'};
+    pls  = getDefaultPlist;
+  end
+  % Build info object
+  ii = minfo(mfilename, 'ao', 'ltpda', utils.const.categories.helper, '$Id: find.m,v 1.47 2011/10/05 12:04:25 ingo Exp $', sets, pls);
+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({'query', 'A search string specifying a query on ''x'' or ''y'' (or ''vals'' for cdata). <br>For example, <tt>''x>3 & x<5''</tt>'},  paramValue.EMPTY_STRING);
+end
+
+