Sets package repositories
Sets package repositories.
useRepos(repos=NULL, where=c("before", "after", "replace"), unique=TRUE, fallback=TRUE, ...)
vectorof repositories to use. If
NULL, nothing is replaced.
characterstring specifying how to add them to the current set of repositories.
TRUE, only unique repositories are set.
TRUE, any remaining non-specified repository value of format '
...@' (e.g. '@CRAN@') than could not be recovered by other means, will be assigned to a pre-defined known value,
- Not used.
- Returns a
listwith element 'repos' reflecting
options("repos")as the options where prior to calling this function.
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