extract_pkgs() extracts required package from various objects, including
TaskGenerator, Learner, Measure and objects from
extension packages such as mlr3pipelines or mlr3filters.
If applied on a list, the function is called recursively on all elements.
install_pkgs() calls extract_pkgs() internally and proceeds with the
installation of extracted packages.
install_pkgs(x, ...)extract_pkgs(x)
# S3 method for character
extract_pkgs(x)
# S3 method for R6
extract_pkgs(x)
# S3 method for list
extract_pkgs(x)
# S3 method for ResampleResult
extract_pkgs(x)
# S3 method for BenchmarkResult
extract_pkgs(x)
extract_pkgs() returns a character() of package strings,
install_pkgs() returns the names of extracted packages invisibly.
(any)
Object with package information (or a list of such objects).
(any)
Additional arguments passed down to remotes::install_cran() or
remotes::install_github().
Arguments force and upgrade are often important in this context.
If a package contains a forward slash ('/'), it is assumed to be a package hosted
on GitHub in "<user>/<repo>" format, and the string will be passed to
remotes::install_github().
Otherwise, the package name will be passed to remotes::install_cran().
extract_pkgs(lrns(c("regr.rpart", "regr.featureless")))
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