[R] discovery (was: data.frame to character)

[Liaw, Andy]

> From: Robert Citek
> 
> How can one discover or list all available built-in objects?
>
> 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.  Is there a function that lists  
> all available built-in objects?

ls(pos="package:base") lists all objects that are user-visible in the base
package.  Do that for any package on the search path.  You might only be
interested in those that are not functions, though.
 
> For example, "pi" is another built-in, but "e" is not.  A means to  
> list them would be nice.

Another useful thing is find(); e.g., find("LETTERS").

Andy
 
> Regards,
> - Robert
> 
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