Build
	sudo apt-get install libbz2-dev
API
	http://cran.r-project.org/doc/manuals/R-exts.pdf
	http://cran.r-project.org/doc/manuals/r-release/R-exts.html
	http://cran.r-project.org/doc/manuals/r-release/R-ints.html
Rinside
	http://dirk.eddelbuettel.com/code/rinside.html
	: tool to make embedding R in C++ easier
Statistics::useR
	http://p3rl.org/Statistics::useR
	: CPAN module that uses the Rembedded API to provide a thin wrapper around
	: R code evaluation. Forking is used to support multiple interpreters, but
	: data is not shared after the fork, nor is there a sharing mechanism
	: built-in for use after the fork (that is, *besides* loading the
	: necessary data before forking).

Statistics::R
	http://p3rl.org/Statistics::R
	: CPAN module that uses pipes to control an R subprocess


Problems to solve
	a good way to represent R objects in Perl
		; data.frame()
	PDL support

args
	use List::AllUtils qw(pairmap);
	$h = { a => 1, b => 2 };
	@kv_pairs = pairmap {  [ $a, $b ] } %$h;