pryr (rhymes with pry bar)
pryr provides tools to pry back the surface of R and dig into the details. It
has been developed in conjunction with
"Advanced R programming" to make
it easier to understand what's going on in R.
The easiest way to install pryr is with devtools:
library(devtools)
install_github("pryr")Tools
pryr includes tools to make it easier to understand the internal
implementation of:
- promises:
uneval(),is_promise(),promise_info() - scoping and environments:
where(),rls(),parenv() - closures:
unenclose() - calls and expressions:
call_tree()
And tools to make it easier to compute on the language:
- Alternative ways to create functions:
make_function(),f() - A version of subtitute that uses regular evaluation,
substitute2(), and one that will substitute objects in the global environment,subs() - Tools to modify language objects:
modify_lang() dots()andnamed_dots()to get unevaluated...- Partial function evaluation:
partial() - Find all functions matching some criteria:
find_funs()
And to use existing R tools more easily:
%<d-%and%<a-%for creating delayed or active bindings%<c-%for creating constants (locked bindings)rebindas a more user friendly version of<<-