CODEWITHSUNDEEP
rpackagedataset
Martund
Martund

Reputation: 301

Using a dataset

How do I use a data set in R which exists in a package that is not loaded? For example, if I want to use the melanoma data, which is in the MASS package, and I write down melanoma, it shows an error message: "Object 'melanoma' not found". If I write data("melanoma"), ot shows

Warning Message: In data("melanoma"): data set 'melanoma' not found

How can I use this data set?

Upvotes: 0

Views: 167

Answers (1)

Ben Bolker
Ben Bolker

Reputation: 226097

Use data(Melanoma, package="MASS")

Note that R is generally case-sensitive; I had to use help.search("melanoma") (which does "fuzzy" rather than exact matching) to figure out that it's called "Melanoma", not "melanoma". (There's also a "melanoma" data set, which might be identical -- I haven't checked -- in the boot package.)

As others have noted in comments you can also say Melanoma <- MASS::Melanoma (you can assign the data to a different variable if you want, e.g. my_melanoma <- MASS::Melanoma). Or you can just use MASS::Melanoma directly in your code, although that will get unwieldy if you have to refer to it a lot.

Upvotes: 3

Related Questions