[R] How to update R without losing packages

[Jeff Newmiller]

Read the comments at the bottom of that blog post.

Note that copying your packages library and updating only works for minor version upgrades... there is no shortcut for a 2.x to 3.x upgrade. That is not your biggest problem though, since not all packages seem to make the jump (become unavailable) during major version changes so some scripts may have to be rewritten to use different approaches anyway. 
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Sent from my phone. Please excuse my brevity.

On October 31, 2014 4:33:24 AM PDT, Kuma Raj <pollaroid at gmail.com> wrote:
>A solution on the link below  provides the steps of updating R without
>losing packages in Unix.
>http://zvfak.blogspot.se/2012/06/updating-r-but-keeping-your-installed.html
>
>How could I do that on windows 7 platform?
>
>Thanks
>
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>R-help at r-project.org mailing list
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>PLEASE do read the posting guide
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>and provide commented, minimal, self-contained, reproducible code.