options

[Peter Dalgaard BSA]

Robert Gentleman <rgentlem@hsph.harvard.edu> writes:

>  Duncan has said that in S, when he threaded it, options was a frame 0
> object and frame 0 was thread specific. We don't really have frames.
> Conceptually it seems that we are going to have to stick an environment
> between GlobalEnv and any evaluation envs where that environment 
> contains thread specific items (perhaps all assignments along that
> thread).

Hmm. Ross has also been talking about "frame 0" when talking about
attachments to position 1. Does that fit in?

If I get the picture right (I've never tried threads in S), there may
be an alternative where the thread-specific environment sits on top of
the the environment from which the thread is started, rather than
GlobalEnv.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
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