[R] detach()

[Liaw, Andy]

> From: Liaw, Andy
> 
> > From: Rolf Turner
> > 
> > Dear Brian,
> > 
> > You wrote:
> > 
> > > If that is to be allowed, then it has to take precedence. 
> What would
> > > you expect if I did
> > > 
> > > data(women)
> > > attach(women)
> > > women <- 4
> > > detach(women)
> > 
> > I would basically expect either all hell to break loose, mainly
> > because of the overwriting of ``women'' or the data base in position
> > 4 to be detached.
> 
> Don't think so.  attach(women) places a copy of `women' in 
> search position
> 2.  women <- 4 creates another object holding the value 4 in 
> the global
> environment.  No data have been destroyed or overwritten.  

I forgot about the first line, data(women), which loads `women' into the
global environment, and that _is_ overwritten by the line women <- 4.

Andy


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