R help - Mar 2011 - How to show non user defined data set such as cu.summary (from rpart)?

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

	[[alternative HTML version deleted]]

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
>
> ? ? ? ?[[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>


-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org

Yes, after you have loaded rpart using library("rpart"), you will find
the search() list similar to this one:

R>  search()
  [1] ".GlobalEnv"        "package:rpart"    
"package:psych"
"package:stats"
  [5] "package:graphics"  "package:grDevices"
"package:datasets"
"package:utils"
  [9] "package:fortunes"  "package:methods"  
"Autoloads"
"package:base"


In order to list the contents of the environment of the rpart package,
use
   ls(pos=2)
now.

Uwe Ligges





On 05.03.2011 17:36, John Edwards 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
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> 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.