Convert input to quoted variables.

Convert characters, formulas and calls to quoted .variables

as.quoted(x, env = parent.frame())

Arguments

x

input to quote

env

environment in which unbound symbols in expression should be evaluated. Defaults to the environment in which as.quoted was executed.

Value

a list of quoted variables

Details

This method is called by default on all plyr functions that take a .variables argument, so that equivalent forms can be used anywhere.

Currently conversions exist for character vectors, formulas and call objects.

See also

.

Examples

as.quoted(c("a", "b", "log(d)"))
#> List of 3
#>  $ a     : symbol a
#>  $ b     : symbol b
#>  $ log(d): language log(d)
#>  - attr(*, "env")=<environment: 0x63d68129dbb8> 
#>  - attr(*, "class")= chr "quoted"
as.quoted(a ~ b + log(d))
#> List of 3
#>  $ a     : symbol a
#>  $ b     : symbol b
#>  $ log(d): language log(d)
#>  - attr(*, "env")=<environment: 0x63d68129dbb8> 
#>  - attr(*, "class")= chr "quoted"