[R] What command lists everything in a package?

[Philippe Grosjean]

If you want a quick overview of a package (not just the name of the 
objects), you can also do:

 > library(help = zoo)


Duncan Murdoch wrote:
> On 7/3/2009 1:21 PM, Mark Knecht wrote:
>> Hi,
>>    Two easy questions I'm sure.
>>
>> 1) As an example if I use the code
>>
>> require(zoo)
>>
>> then once it's loaded is there a command that lists everything that
>> zoo provides so that I can study the package?
> 
> ls("package:zoo") will list all the exported items in zoo, provided it 
> is attached. You can abbreviate that to the number in the search list, 
> which is usually 2 immediately after you attach the package.  So
> 
> require(zoo)
> ls(2)
> 
> will probably do what you want.  Use search() to see the search list.
> 
> Duncan Murdoch
> 
>>
>>    Certainly help(zoo) gives me some clues about what zoo does but I'd
>> like a list. Maybe there's a way to query something but in Rgui under
>> Win Vista ls() returns nothing after zoo is loaded.
>>
>> 2) Related to the above, how do I tell what packages are currently
>> loaded at any given time so that I don't waste time loading things
>> that are already loaded? search() tells me what's available, but
>> what's loaded? The best I can find so far goes like this:
>>
>>> a<-.packages(all.available = FALSE)
>>> a
>> [1] "zoo"       "stats"     "graphics"  "grDevices" "utils"     
>> "datasets"
>> [7] "methods"   "base"
>>>
>>
>> Maybe that's as good as it gets in code and if I want better then I
>> write a function?
>>
>> Thanks,
>> Mark
>>
>> ______________________________________________
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>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide 
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
>