R.utils (version 2.12.3)

env: Creates a new environment, evaluates an expression therein, and returns the environment

Description

Creates a new environment, evaluates an expression therein, and returns the environment.

Usage

env(..., hash=FALSE, parent=parent.frame(), size=29L)

Value

Returns an environment.

Arguments

...

Arguments passed to evalq(), particularly a expression to be evaluated inside the newly created environment.

hash, parent, size

Arguments passed to new.env().

Author

Henrik Bengtsson

References

[1] R-devel thread 'Create an environment and assign objects to it in one go?' on March 9-10, 2011.

See Also

Internally new.env() and evalq() are used.

Examples

x <- list();

x$case1 <- env({
 # Cut'n'pasted from elsewhere
 a <- 1;
 b <- 2;
});

x$case2 <- env({
 # Cut'n'pasted from elsewhere
 foo <- function(x) x^2;
 a <- foo(2);
 b <- 1;
 rm(foo); # Not needed anymore
});

# Turn into a list of lists
x <- lapply(x, FUN=as.list);

str(x);