c----------------------------------------------------------------------
	subroutine odff(n,f,df)
c ODFF does an open-ended differentiation:  Just like stddff, but not using 
c the y=0 point.  This is helpful for r integrations, to avoid r=infinity.
c
c author: Kieron, 8.14.99
c     in:
c    out:
c calls: STDDFF
	implicit real*8(a-h,o-z)
	dimension f(0:n),df(0:n),iwt0(0:5),iwt1(0:5),iwt2(0:5)