needs is a simple R function to make package loading /
installation hassle-free — use it in place of
library to attach
packages and automatically install any that are missing. You can also supply
a minimum version number, and it will update old packages as needed. No more
changing your code to reinstall packages every time you update R —
needs does it for you.
Source repo: http://www.github.com/joshkatz/needs
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