How to search dataset

[satimis]

Hi folks,

I can't figure out using help.search to find the name of the dataset on database. If it is NOT the right tool please advise which tool shall I use? TIA

B.R.
Stephen L

[Dason]

what do you mean "on database"? Do you mean a dataset that is loaded into R by default? Or do you really mean on a database that you would need to access through some sort of database language?

[satimis]

what do you mean "on database"? Do you mean a dataset that is loaded into R by default? Or do you really mean on a database that you would need to access through some sort of database language?

Hi,

I referred to the datasets on;

1)
data()

2)
library(AER) # as example
data()

Thanks

B.R.
satimis

[Dason]

data() will give you a list of all the datasets currently loaded.

Once you load a package the datasets that come with that package will be shown with data() as well.

If you just want to know what datasets come with a package before loading (or even after loading it) you can use data(package = "package_name_here").

If you want to list all the available datasets for all packages (even if they aren't loaded yet) you can use data(package = .packages(all.available = TRUE))

[satimis]

data() will give you a list of all the datasets currently loaded.

Once you load a package the datasets that come with that package will be shown with data() as well.

If you just want to know what datasets come with a package before loading (or even after loading it) you can use data(package = "package_name_here").

If you want to list all the available datasets for all packages (even if they aren't loaded yet) you can use data(package = .packages(all.available = TRUE))

> data(package = "DNase")

Error in .find.package(package, lib.loc, verbose = verbose) : 
  there is no package called 'DNase'

> data() # DNase is there.

> data(package = "BOD")

Error in .find.package(package, lib.loc, verbose = verbose) : 
  there is no package called 'BOD'

> data() # BOD is there.


> data(package = .packages(all.available = TRUE))

Warning messages:
1: In data(package = .packages(all.available = TRUE)) :
  datasets have been moved from package 'base' to package 'datasets'
2: In data(package = .packages(all.available = TRUE)) :
  datasets have been moved from package 'stats' to package 'datasets'

It works. Thanks

B.R.
satimis

[satimis]

Hi folks,

I still haven't resolved to find from which package a dataset comes.

e.g.
If I want to find which package provides "MedUnits" what command shall I run?

TIA

B.R.
satimis

[Dason]

Try

?MedUnits

At the top of the help page it will tell you which package it comes from.

[satimis]

Try

?MedUnits

At the top of the help page it will tell you which package it comes from.

Thanks

Some of them need ??

e.g.
?MedUnits

doesn't work

??MedUnits
works

B.R.
satimis

[Dason]

Ah. If you don't have the dataset loaded yet then I think you would need the double question marks.