copyfields

'copyfields' copy fields between two matlab structures
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 OUPUT:
 NewData: resulting structure

INPUT:
 listfields: cell arrays representing the list of field names to be copied
 SourceData: structure containing the source data to copy in NewData
 OldData: (optional) preexisting data structure.

0001 %'copyfields' copy fields between two matlab structures
0002 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0003 % OUPUT:
0004 % NewData: resulting structure
0005 %
0006 %INPUT:
0007 % listfields: cell arrays representing the list of field names to be copied
0008 % SourceData: structure containing the source data to copy in NewData
0009 % OldData: (optional) preexisting data structure.
0010 
0011 function NewData=copyfields(listfields,SourceData,OldData)
0012 if ~exist('OldData','var')
0013     OldData=[];
0014 end
0015 NewData=OldData;%default
0016 for ifield=1:length(listfields)
0017     if isfield(SourceData,listfields{ifield}) & ~isempty(eval(['SourceData.' listfields{ifield}]))
0018         eval(['NewData.' listfields{ifield} '=SourceData.' listfields{ifield} ';']); 
0019     elseif isfield(OldData,listfields{ifield})
0020         NewData=rmfield(NewData,listfields{ifield});
0021     end
0022 end