# install packages
installPkgs <- function(list_of_pkgs, lib=.libPaths()) {
if (!(lib %in% .libPaths())) {
dir.create(lib, showWarnings=FALSE)
.libPaths(c(lib, .libPaths()))
}
new_packages <- list_of_pkgs[!(list_of_pkgs %in% installed.packages()[,"Package"])]
if(length(new_packages)) {
sapply(new_packages, install.packages, lib=lib)
}
}
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