Hi Simone,
maybe this helps:
[code START]
>>> import numpy
>>> a = [[1,2,3],[4,5,6]]
>>> aa = numpy.array(a)
>>> aa
array([[1, 2, 3],
[4, 5, 6]])
>>> import rpy2.robjects as ro
>>> import rpy2.robjects.numpy2ri
>>> aR = ro.conversion.py2ri(aa)
>>> aR
<RArray - Python:0x014E7D00 / R:0x0211AF98>
>>> print aR
[,1] [,2] [,3]
[1,] 1 2 3
[2,] 4 5 6
[code END]
cheers
Oliver
Laurent Gautier <lgaut...@gmail.com> wrote on 14.01.2009 23:11:28:
> Simone Gabbriellini wrote:
> > I would like to know if there is something like r.assign('ROBJECT',
> > PYTHONOBJECT) in rpy2...
>
> http://rpy.sourceforge.net/rpy2/doc/html/robjects.html?
> highlight=assign#environments
>
> Or "assign" as you write above:
> r.assign("foo", 123)
>
>
> > I don't want to use R function to evaluate an object IN Python, I want
> > to assign a matrix made in python to an R object...
> >
> > simone
> >
> > 2009/1/14 Simone Gabbriellini <simone.gabbriell...@gmail.com>:
> >> [so sorry but I just answer your mail... I write to the list and you
> >> answer to ME and to the list in CC... I have to remember to answer to
> >> ALL to answer to the mailing list too... again, sorry for that, I
> >> didn't mean to offend you]
> >>
> >> and thanks for the help
> >> simone
> >>
> >> 2009/1/14 Laurent Gautier <lgaut...@gmail.com>:
> >>> [why getting off the list ???]
> >>>
> >>> Simone Gabbriellini wrote:
> >>>> please do you have an example?
> >>>>
> >>>> because when I read "That import alone is sufficient to switch an
> >>>> automatic conversion of numpy objects into rpy2 objects." I suppose
> >>>> that every numpy object is seen by R...
> >>> Automatic conversion of a numpy object:
> >>>
> >>> rlen = robjects.r['length']
> >>> print(rlen(gladj))
> >>>
> >>>
> >>> You are otherwise giving a *string* to be evaluated as R code
> >>> (and R not looking into the python namespace when trying resolvea
symbol).
> >>> More on evaluating strings here:
> >>> http://rpy.sourceforge.net/rpy2/doc/html/robjects.html?
> highlight=r_repr#strings-as-r-code
> >>>
> >>>> thank you,
> >>>> simone
> >>>>
> >>>> 2009/1/14 Laurent Gautier <lgaut...@gmail.com>:
> >>>>> Simone Gabbriellini wrote:
> >>>>>> yes, like that...
> >>>>>>
> >>>>>> but simply importing:
> >>>>>>
> >>>>>> Import rpy2.robjects.numpy2ri
> >>>>>>
> >>>>>> when I do:
> >>>>>>
> >>>>>> g1adj = numpy.array(g1adj)
> >>>>>>
> >>>>>> robjects.r('QAPset[1,,]<-g1adj')
> >>>>> R has no way to know your Python variable called "gladj" unless you
> >>>>> indicate
> >>>>> it.
> >>>>>
> >>>>> print(robjects.r('ls()'))
> >>>>> should confirm that there is no variable 'gladj' in your globalEnv.
> >>>>>
> >>>>>
> >>>>>> it says:
> >>>>>>
> >>>>>> Error in eval(expr, envir, enclos) : object "g1adj" not found...
> >>>>> The error message above is correct, I think.
> >>>>>
> >>>>>> while
> >>>>>> in the docs it says that:
> >>>>>> "That import alone is sufficient to switch an automatic conversion
of
> >>>>>> numpy objects into rpy2 objects."
> >>>>>>
> >>>>>> should I do something else?
> >>>>>>
> >>>>>> thank you,
> >>>>>> simone
> >>>>>>
> >>>>>> 2009/1/14 Laurent Gautier <lgaut...@gmail.com>:
> >>>>>>> Something like this
> >>>>>>>
http://rpy.sourceforge.net/rpy2/doc/html/numpy.html?highlight=numpy
> >>>>>>> ?
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> Simone Gabbriellini wrote:
> >>>>>>>> dear List,
> >>>>>>>>
> >>>>>>>> is it possible to pass a matrix I've built in python to R via
rpy2?
> >>>>>>>>
> >>>>>>>> I'm sure I'm blind, but I cannot find example about how to
> pass object
> >>>>>>>> from python to r, while I see how to pass object from r to
python...
> >>>>>>>>
> >>>>>>>> best regards,
> >>>>>>>> Simone Gabbriellini
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
>
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> >
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