ns-topenv
Top Level Environment
Finding the top level environment from an environment
envir and its enclosing environments.
- Keywords
- programming
Usage
topenv(envir = parent.frame(),
matchThisEnv = getOption("topLevelEnvironment"))Arguments
- envir
environment.
- matchThisEnv
return this environment, if it matches before any other criterion is satisfied. The default, the option topLevelEnvironment, is set by
sys.source, which treats a specific environment as the top level environment. Supplying the argument asNULLmeans it will never match.
Details
topenv returns the first top level environment
found when searching envir and its enclosing environments. An
environment is considered top level if it is the internal environment
of a namespace, a package environment in the search
path, or .GlobalEnv .
See Also
environment, notably parent.env() on
“enclosing environments”;
loadNamespace for more on namespaces.
Examples
library(base)
# NOT RUN {
topenv(.GlobalEnv)
topenv(new.env()) # also global env
topenv(environment(ls))# namespace:base
topenv(environment(lm))# namespace:stats
# }