What is a 'closure'?

http://www.lemnica.com/esotericR/Introducing-Closures/

Any function you work with will be a closure -- primitives are
built-in functions that users can't create. (without source editing &
recompiling R) E.g. the function c() (type it without parentheses at
the prompt to see its "code")

Let me know if I can explain more,

Michael

The "R Language Definition" at http://cran.r-project.org/doc/manuals/R-lang.html states in the following section

4.3.2 Argument matching
This subsection applies to closures but not to primitive functions.

What are 'closures'?
? ? ? ?[[alternative HTML version deleted]]

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