How to add documentation to a data.frame in R?

Question

I\'ve been using R for a while and I\'ve realized it would help a lot if you could attach a description data contained in the data.frame, because you could gather all useful res

Answer 1

You can add it as an arbitrary attribute:

attr(df,"doc") = "This is my documentation"

These things are mostly preserved by slicing n subsetting, but some processes will drop them. Such is the nature of a pass-by-value system.

There may even be a package on CRAN for more complex metadata as attributes with some wrapper functions, but underneath its all attributes...