On Mon, Jun 15, 2009 at 4:15 PM, Xavier
Tremblay<xavier.tremb...@polymtl.ca> wrote:
>
> Hello all,
>
> I tried to find my answer in the archives of this mailing list, on Google and
> on
> RPY website, but I've found nothing so far. So forgive me if this was already
> asked or dumb question.
>
> I'm trying to load a data set from MASS library, birthwt with the following
> code
>
> import rpy2.robjects as robjects
> r = robjects.r
> r.library('MASS')
> r.attach('birthwt')
>
> However I have the following error :
>
> Error in function (what, pos = 2, name = deparse(substitute(what)),
> warn.conflicts = TRUE) :
> file 'birthwt' not found
> Traceback (most recent call last):
> File "/home/xatre/workspace/FrameWork/src/birth.py", line 10, in ?
> r.attach('birthwt')
> File "/usr/lib64/python2.4/site-packages/rpy2/robjects/__init__.py", line
> 422,
> in __call__
> res = super(RFunction, self).__call__(*new_args, **new_kwargs)
> rinterface.RRuntimeError: Error in function (what, pos = 2, name =
> deparse(substitute(what)), warn.conflicts = TRUE) :
> file 'birthwt' not found
>
> It seems that my rpy2's "R instance" can't load or find the data set. Is this
> a
> known issue ? How can I make rpy2's "R instance" find it, because my R can
> load it. Do I need to move my data set in my folder where my .py is lunched ?
I don't know how to fix this, but for what it is worth, the exact same
error happens in rpy1:
>>> import rpy
>>> rpy.r.library("MASS")
['MASS', 'stats', 'graphics', 'grDevices', 'utils', 'datasets',
'methods', 'base']
>>> rpy.r.attach("birthwt")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
rpy.RPy_RException: Error in function (what, pos = 2, name =
deparse(substitute(what)), warn.conflicts = TRUE) :
file 'birthwt' not found
In the absence of any other suggestions, I would just not use attach
and instead access the birthwt data explicitly by name. Of course,
being more of a python programmer than an R programmer, I like to have
things explicit ;)
Peter
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