[R] getting list of data.frame names

[Joshua Wiley]

Hi Erin,

Try this: names(which(sapply(.GlobalEnv, is.data.frame)))

Cheers,

Josh

On Sat, Oct 1, 2011 at 8:37 PM, Erin Hodgess <erinm.hodgess at gmail.com> wrote:
> Dear R People:
>
> This is probably a very simple question.  I know that if I want to get
> a list of the classes of the objects in the workspace, I can do this:
>
>> sapply(ls(), function(x)class(get(x)))
>           a        a1.df            b            d
>      "list" "data.frame"    "integer"    "numeric"
>
> Now I want to get just the data frames.
>> sapply(ls(), function(x)class(get(x))=="data.frame")
>    a a1.df     b     d
> FALSE  TRUE FALSE FALSE
>
> However, I would like the names of the data frames, rather than the
> True/False for the objects.
>
> I've been trying all sorts of combinations/permutations with no success.
>
> Any suggestions would be much appreciated.
>
> Thanks,
> Sincerely,
> Erin
>
>
>
> --
> Erin Hodgess
> Associate Professor
> Department of Computer and Mathematical Sciences
> University of Houston - Downtown
> mailto: erinm.hodgess at gmail.com
>
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>



-- 
Joshua Wiley
Ph.D. Student, Health Psychology
Programmer Analyst II, ATS Statistical Consulting Group
University of California, Los Angeles
https://joshuawiley.com/