[R] How to unload a package or "undo" library("package")

[Ales Ziberna]

If I do  detach(package:blockmodeling)

My package "blockmodeling" does not appear in (.packages())
[1] "methods"   "stats"     "graphics"  "grDevices" "utils"     "datasets" 
[7] "base"   

However, if I want to install a newer version from a local zip file, I get:
utils:::menuInstallLocal()
package 'blockmodeling' successfully unpacked and MD5 sums checked
Error: cannot remove prior installation of package 'blockmodeling'


Is there any way around that?

Best,
Ales Ziberna

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Gabor Grothendieck
Sent: Sunday, January 08, 2006 10:42 PM
To: Aleš Žiberna
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] How to unload a package or "undo" library("package")

Here are some things to try:

detach() - detach most recent attached package
detach(2) - detach package which is in position 2 on search list. 
Same as detach()
detach("package:mypackage") - mypackage from search list
search() - display search list

On 1/8/06, Aleš Žiberna <ales.ziberna at gmail.com> wrote:
> Hello!
>
> I would like to unload a package form a current R session. I tried 
> datach(package:packagename), however it does not work. The reason I 
> want to unload it is that I want to correct some files in the package 
> and reinstall it without closing an R session.
>
> Best,
> Ales Ziberna
>
> PS: I am using R 2.1.1 on Windows XP
>
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