Dear Pragya,

Did you first create the folder '.R/library' in your home? It sounds weird that it is not writable... Next, if you log as root, it is likely that '~' refers to the home of the root user. Thus, you might need to explicitly give the complete name. But really, I wouldn't advise to install packages *in your home* while logged as root: every file will be owned by root...

Once you manage to use '~/.R/library' as a regular user, my advice is to tell it in a .Renviron file (directly in '~/'), so that you don't need to explicitly tell while installing packages.

### Packages in the home directory:
R_LIBS="~/.R/library:${R_LIBS}"

With this, R will try first in '~/.R/library', and next in the usual folders if it didn't succeed.

Hope this helps,
Mathieu.


Le 30/10/2010 02:34, pragya agarwal a écrit :
Hi

I am trying to install R-igraph, but when I issue the command :

install.packages("igraph", lib="~/.R/library")

in the R session, I get the following error:

Warning in install.packages("igraph", lib = "~/.R/library") :
   'lib = "~/.R/library"' is not writable
Error in install.packages("igraph", lib = "~/.R/library") :
   unable to install packages

I have tried the command by logging in as the root user, but that also
didn't work.

Can anyone please help me??

Thanks,
Pragya

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Mathieu Basille, Post-Doc

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Laboratoire d'Écologie Comportementale et de Conservation de la Faune
+ Centre d'Étude de la Forêt
Département de Biologie
Université Laval, Québec

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http://ase-research.org/basille

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``If you can't win by reason, go for volume.''
Calvin, by Bill Watterson.

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