R help - Jan 2012 - What is a 'closure'?

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]]

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

On Thu, Jan 19, 2012 at 2:45 PM, Ajay Askoolum <aa2e72e at yahoo.co.uk>
wrote:
> 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]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

On Thu, Jan 19, 2012 at 1:45 PM, Ajay Askoolum <aa2e72e at yahoo.co.uk>
wrote:
> 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'?
You might find the discussion here helpful:
https://github.com/hadley/devtools/wiki/First-class-functions

Hadley

-- 
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/