This function allows you to install packages.
install_if_needed(pkgs, lib = NULL, repos = getOption("repos"), contriburl = contrib.url(repos, type), method, available = NULL, destdir = NULL, dependencies = NA, type = getOption("pkgType"), configure.args = getOption("configure.args"), configure.vars = getOption("configure.vars"), clean = FALSE, Ncpus = getOption("Ncpus", 1L), verbose = getOption("verbose"), libs_only = FALSE, INSTALL_opts, quiet = FALSE, keep_outputs = FALSE, check_version = TRUE, ...)
install_if_needed("dplyr")#> Warning: Skipping dplyr