Wed, 9 Nov 2005, Li, Jia wrote:

Dear all,

I have to use double-bootstrap to resample a data set. I am not familiar
with double-bootstrap in R, so I am wondering if there is a function
that is related to it

Double bootstrapping is not a way `to resample a data set' (it is rather
about adjusting estimators). It is discussed with worked examples in
Davison and Hinkley (1997) which is the book that package 'boot' supports
(and they will have used that package, albeit in S-PLUS).