Hi all,

Today I came across scoping in the R
intro<http://cran.r-project.org/doc/manuals/R-intro.html#Scope> (after
reading Robert Gentleman
fortune<http://rfortunes.posterous.com/im-always-thrilled-when-people-discover-what>
on
lexical scooping) , and am very curious about the <<- assignment.

The manual showed one (very interesting) example for "<<-", which I feel I
understood. What I am still missing is the context of when this can be
useful.

So what I would love to read from you are examples (or links to examples) on
when using "<<-" can be interesting/useful. What might be the dangers of
using it (it looks easy to loose track of), and any tips you might feel like
sharing.

Thanks,
Tal


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