Message-ID: <20050610192114.6be585d2.Achim.Zeileis@wu-wien.ac.at>
Date: 2005-06-10T17:21:14Z
From: Achim Zeileis
Subject: discovery (was: data.frame to character)
In-Reply-To: <39FDAD7D-80B1-40F2-AB22-5EBA92F79817@alum.calberkeley.org>
On Fri, 10 Jun 2005 11:59:07 -0500 Robert Citek wrote:
> How can one discover or list all available built-in objects?
Depends what you mean with `built-in'...
> On Jun 10, 2005, at 7:23 AM, Muhammad Subianto wrote:
> >> L3 <- LETTERS[1:3]
> >> L10 <- LETTERS[1:10]
>
> LETTERS is apparently a built-in character vector. ls() and objects
> () only lists the ones I've created.
More precisely, it lists the objects in the global environment.
> Is there a function that lists all available built-in objects?
R> search()
will show you the search path and in particular all packages that are
currently attached. Using
R> ls("package:base")
you could list all objects in the base packages which includes LETTERS.
> For example, "pi" is another built-in, but "e" is not.
But "exp" is. So
R> exp(1)
will give you "e".
Z
> A means to
> list them would be nice.
>
> Regards,
> - Robert
>
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