This function is vectorised so you can install multiple packages in a single command.
install_url(url, subdir = NULL, ...)
location of package on internet. The url should point to a zip file, a tar file or a bzipped/gzipped tar file.
subdirectory within url bundle that contains the R package.
Other arguments passed on to install.packages.
install.packages
# NOT RUN { install_url("https://github.com/hadley/stringr/archive/master.zip") # }
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