[pymvpa] RPy and ENET

[Yaroslav Halchenko]

Hi Tara,

Unfortunately switch to (support of) Rpy2 is only in our plans and we
haven't touched it at all yet.

I will check it out later on today if we could just use
rpy-compatibility layer in rpy2 for now... I will update you

On Mon, 21 Dec 2009, Tara Gilliam wrote:

> Hello,

> When I try to import the ENET classifier, I get an dependency error
> about rpy being unavailable (PyMVPA version 0.4.3).

> I can 'import rpy2', but not 'import rpy' - is it definitely the
> original RPy that is required, or will RPy2 also work? The system I
> am on is university-administered with RPy2 installed, and rpy does
> not work with our current version of R. So if possible I would
> prefer not having to install a lot of (unsupported) dependencies for
> just this classifier item.

> Looking further, the segment of code seems to be this (clfs/enet.py, lines 18-22):

> # do conditional to be able to build module reference
> if externals.exists('rpy', raiseException=True) and \
>    externals.exists('elasticnet', raiseException=True):
>     import rpy
>     rpy.r.library('elasticnet')


> From the Rpy2 documentation, there seems to be a sort of Rpy-compatible mode:
> from http://rpy.sourceforge.net/rpy2/doc/html/rpy_classic.html, allowing e.g.

> import rpy2.rpy_classic as rpy
> rpy.r.library('splines')

> Do you know of any (e.g. version-specific) issue that would prevent
> a local patch to the import statement from working here? Are there
> any plans to switch PyMVPA to RPy2?

> Many thanks,
> Tara


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