I am a new IDL user and I have a question : I would like to analyse 30 netCDF files (same formats, for 30 consecutive years) as a single netCDF (and not ASCII) one, within IDL. Is there a way in IDL to aggregate multiple files into a single one (i.e. keeping netCDF format) or do I have to add the differents arrays within a loop ? Thanks in advance Brigitte Koffi