Are you using rpy2-2.1dev ?
If so, there were issues and you will want a (very) fresh update of the
code on the bitbucket repository.
L.
Manuel A. Rivas wrote:
> Thanks Laurent,
>
> Were you able to succesfully create the lm ?
>
> I get the following error with NO_CONVERSION:
>
> >>> rpy.r.lm(rpy.r("y ~ x"), data = rpy.r.data_frame(x=my_x, y=my_y))
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "/home/radon00/rivas/lib/python/rpy2/rpy_classic.py", line 265,
> in __call__
> return self.eval(self.parse(text=s))
> File "/home/radon00/rivas/lib/python/rpy2/rpy_classic.py", line 199,
> in __call__
> a = a.getSexp()
> AttributeError: 'Robj' object has no attribute 'getSexp'
>
>
> thanks,
> manuel
>
> On Aug 5, 2009, at 11:17 AM, Laurent Gautier wrote:
>
>> Manuel A. Rivas wrote:
>>> Hello , I am trying to use the r.nls function from rpy2 in the same
>>> fashion as rpy by importing rpy_classic. In R: the syntax y ~ x
>>> would tell the lm function that y depends on x as its model. In
>>> python using rpy I would use rpy's "evaluate a string" functionality.
>>> i.e.
>>>> >>> from rpy import r
>>>> >>> my_x = [5.05, 6.75, 3.21, 2.66]
>>>> >>> my_y = [1.65, 26.5, -5.93, 7.96]
>>>> >>> print r.lm(r("y ~ x"), data = r.data_frame(x=my_x,
>>>> y=my_y))['coefficients']
>>> as described in the man pages: However, if I do the same with rpy2
>>> >>> from rpy2.rpy_classic import r
>>> >>> my_x = [5.05, 6.75, 3.21, 2.66]
>>> >>> my_y = [1.65, 26.5, -5.93, 7.96]
>>> >>> r.lm(r("y ~ x"), data = r.data_frame(x=my_x, y=my_y))
>>> I get the following error: Traceback (most recent call last):
>>> File "<stdin>", line 1, in <module>
>>> File "/home/radon00/rivas/lib/python/rpy2/rpy_classic.py", line 265,
>>> in __call__
>>> return self.eval(self.parse(text=s))
>>> File "/home/radon00/rivas/lib/python/rpy2/rpy_classic.py", line 215,
>>> in __call__
>>> res = rpy2py(res)
>>> File "/home/radon00/rivas/lib/python/rpy2/rpy_classic.py", line 174,
>>> in rpy2py
>>> res = rpy2py_basic(obj)
>>> File "/home/radon00/rivas/lib/python/rpy2/rpy_classic.py", line 160,
>>> in rpy2py_basic
>>> raise ValueError("Invalid type for 'obj'.")
>>> ValueError: Invalid type for 'obj'.
>>> any ideas how to do the same operation in rpy2 with rpy_classic?
>>
>> Try adding this to the beginning:
>>
>> import rpy2.rpy_classic as rpy
>> rpy.set_default_mode(rpy.NO_CONVERSION)
>>
>>
>> (rpy_classic is way behind the rest of rpy2 because of limited time on
>> my end, and seemingly limited interest/contributions from users in
>> having it improved to a full compatibility).
>>
>>
>>
>> L.
>>
>>
>>> thanks,
>>> Manuel Rivas
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