Assigns an objects elements locally

Assigns an objects elements locally.

# S3 method for list
attachLocally(object, fields=NULL, excludeFields=NULL, overwrite=TRUE,
  envir=parent.frame(), ...)

Arguments

object

An object with named elements such as an environment, a list, or a data.frame.

fields

A character vector specifying elements to be copied. If NULL, all elements are considered.

excludeFields

A character vector specifying elements not to be copied. This has higher priority than fields.

overwrite

If FALSE, fields that already exists will not be copied.

envir

The environment where elements are copied to.

...

Not used.

Value

Returns (invisibly) a character

vector of the fields copied.

Author

Henrik Bengtsson

See also

attachLocally() of class Object. attach().

Examples

foo <- function(object) {
  cat("Local objects in foo():\n")
  print(ls())

  attachLocally(object)

  cat("\nLocal objects in foo():\n")
  print(ls())

  for (name in ls()) {
    cat("\nObject '", name, "':\n", sep="")
    print(get(name, inherits=FALSE))
  }
}

a <- "A string"
l <- list(a=1:10, msg="Hello world", df=data.frame(a=NA, b=2))
foo(l)
#> Local objects in foo():
#> [1] "object"
#> 
#> Local objects in foo():
#> [1] "a"      "df"     "msg"    "object"
#> 
#> Object 'a':
#>  [1]  1  2  3  4  5  6  7  8  9 10
#> 
#> Object 'df':
#>    a b
#> 1 NA 2
#> 
#> Object 'msg':
#> [1] "Hello world"
#> 
#> Object 'object':
#> $a
#>  [1]  1  2  3  4  5  6  7  8  9 10
#> 
#> $msg
#> [1] "Hello world"
#> 
#> $df
#>    a b
#> 1 NA 2
#> 
print(a)
#> [1] "A string"