> >> How do I remove all objects except one in R?
> >>
> > rm(list=ls()) #will remove ALL objects
> 
> But he wanted to remove all objects ***except one***!!!  So what's the
> point of this answer?
> 
> I can't see any way except a rather round-about kludge to do what the
> OP wants. ...

That might work.  Or try this, replacing QQQ with the name of the object 
you want to keep.
rm(list=ls()[!grepl('^QQQ$',ls())])

cur
-- 
Curt Seeliger, Data Ranger
Raytheon Information Services - Contractor to ORD
seeliger.curt@epa.gov
541/754-4638


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