[R] How to show non user defined data set such as cu.summary (from rpart)?

[Ista Zahn]

Hi John,
Not sure how to do it with ls(), but easy enough with data():

data(package=library(base))

You'll need to consult both ?data and ?library to see why this works.
labrary(base) could just as easily be library(stats) or whatever.

Best,
Ista

On Sat, Mar 5, 2011 at 4:36 PM, John Edwards <jhnedwards603 at gmail.com> wrote:
> Hi All,
>
> ls() doesn't show cu.summary. ?ls says "When invoked with no argument at the
> top level prompt, \u2018ls\u2019 shows what data sets and functions a user
> has defined." Therefore, the reason ls() doesn't show cu.summary is because
> cu.summary is from a package but not user defined. Is there a way to show
> not only user defined data sets but also data sets from loaded packages?
>
>> library(rpart)
>> str(cu.summary)
> 'data.frame': 117 obs. of  5 variables:
>  $ Price      : num  11950 6851 6995 8895 7402 ...
>  $ Country    : Factor w/ 10 levels "Brazil","England",..: 5 5 10 10 10 7 5
> 6 6 7 ...
>  $ Reliability: Ord.factor w/ 5 levels "Much worse"<"worse"<..: 5 NA 1 4 2 4
> NA 5 5 2 ...
>  $ Mileage    : num  NA NA NA 33 33 37 NA NA 32 NA ...
>  $ Type       : Factor w/ 6 levels "Compact","Large",..: 4 4 4 4 4 4 4 4 4 4
> ...
>> ?ls
>> ls()
> character(0)
>
> -John
>
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>
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-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org