From RStudio's CRAN Mirror http://cran-logs.rstudio.com/
packageCountry(packages = "cholera", date = NULL, all.filters = FALSE,
ip.filter = FALSE, triplet.filter = FALSE, small.filter = FALSE,
sequence.filter = FALSE, size.filter = FALSE, sort = TRUE,
na.rm = FALSE, memoization = TRUE, check.package = TRUE)
Character. Vector of package name(s).
Character. Date. "yyyy-mm-dd". NULL uses latest available log.
Logical. Master switch for filters.
Logical.
Logical.
Logical.
Logical.
Logical.
Logical. Sort by download count.
Logical. Remove NAs.
Logical. Use memoization when downloading logs.
Logical. Validate and "spell check" package.