List-like Environment of Functions (and More)

Construct a “list”, really an environment typically of functions and optionally other R objects, where the functions and formulas all all share the same environment. Consequently, the functions may call each other.

On technical level, this is just a simple wrapper around list2env().

Usage

funEnv(..., envir = NULL, parent = parent.frame(),
       hash = (...length() > 100), size = max(29L, ...length()))

Arguments

...: an arbitrary named “list” of R objects, typically including several functions.
envir: an environment or NULL.
parent: (for the case envir = NULL): a parent frame aka enclosing environment, see new.env and list2env.
hash, size: (for the case envir = NULL): hash a logical indicating if the created environment should use hashing, and (size) the hash size, see list2env.

Value

an environment, say E, containing the objects from ... (plus those in envir), and all function objects' environment() is E.

Author

Martin Maechler

Examples

ee <- funEnv(f = function(x) g(2*(x+1)),
             g = function(y) hh(y+1),
            hh = function(u) u^2,
          info = "Some Information (not a function)")
ls(ee) # here the same as  names(ee)
#> [1] "f"    "g"    "hh"   "info"
## Check that it works: i.e., that "f sees g" and "g sees hh":
stopifnot(all.equal(ee$f(pi), (2*pi+3)^2))
ee$f(0:4) # [1]  9  25  49  81 121
#> [1]   9  25  49  81 121