Re: [R] How to test if t[["cat"]] exists ?

From: Charilaos Skiadas <cskiadas_at_gmail.com>
Date: Tue, 15 Apr 2008 22:44:00 -0400

On Apr 15, 2008, at 9:53 PM, Ng Stanley wrote:

> Hi,
>
>> t <- list("cat"=1)
>> exists("t")
> [1] TRUE
>> exists("t[["cat"]]")
> Error: unexpected symbol in "exists("t[["cat"
>> exists("t[[\"cat\"]]")
> [1] FALSE
Perhaps what you want is:

"cat" %in% names(t)

> Thanks
> Stanley

Haris Skiadas
Department of Mathematics and Computer Science Hanover College



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