On 02/10/2012 21:38, Søren Højsgaard wrote:
I don't know if it would work but a kludgy attempt would be to install lme4
from CRAN, rename the lme4 directory in library to lme4cran; then install lme4
from R-forge and rename the lme4 directory to lme4forge. Then create a script
flexible script that would copy one of the directories to a directory called
lme4 on the fly. I don't know if it would work, but I just wonder if there
would possibly a more elegant way.
Do you want them installed or loaded?
For installation, simply use different library directories, and adjust
.libPaths.
You won't succeed in loading them together: the insuperable problem is
not the R functions (they could be in different environments) but the
DLLs (you can only load one DLL of a given name).
We've been here with versioned installs, which were abandoned a long
while ago (not least as we never had versioned namespaces).
Regards
Søren
-----Original Message-----
From: Greg Snow [mailto:538...@gmail.com]
Sent: 2. oktober 2012 22:27
To: Søren Højsgaard
Cc: r-help@r-project.org
Subject: Re: [R] Having two different versions of a package in the same R
installation
So if you have both loaded in the same instance of R, how will R know which
version of lmer or other functions that you want to run?
It seems cleanest to me to have the 2 different instances of R running like you
do now. The other option would be to change all the names (exported ones
anyways) in one version and change that package name as well. Then you would
have 2 different package names with different exported function names.
On Tue, Oct 2, 2012 at 2:18 PM, Søren Højsgaard <sor...@math.aau.dk> wrote:
Dear list,
I am making some comparisons of two versions of the lme4 package: The CRAN
version and the R-Forge version. For the moment I have two different R
installations, each with a different version of lme4. However it would be
convenient if I could have the same version within the same R installation such
that I can run a code chunk on one lme4 version and immediately after run the
same code chunk on another lme4 version. Does anyone know if this is possible?
Best regards
Søren
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