COPYRIGHT STATUS
----------------

This bulk of this code is

  Copyright (C) 2004 Achim Zeileis, Gabor Grothendieck

and R/na.approx.R which is

  Copyright (C) 2004 Achim Zeileis, Gabor Grothendieck, Sundar Dorai-Raj

All code is subject to the GNU General Public License, Version 2. See
the file COPYING for the exact conditions under which you may
redistribute it.
