Hi Laurent,
Once again, thanks very much.
I'm not a Python user. I'm trying learn a little about it, so it was useful
your hint about the 'pydoc string'.
I will try the approach you suggested using R's sink() function or maybe the
capture.output() function.
As the R's stem() function works on RPy1x I thought that it could work in
rpy2 too.
Cheers.
2008/12/16 Laurent Gautier <lgaut...@gmail.com>
> Cc'ing the answer to the list (as it may interest others).
>
>
> Marcos Silva wrote:
>
>> Hi Laurent,
>>
>> Thanks for your quick response.
>>
>> By the way, can I use **r_repr()** [well, by now I don't know for what is
>> this function for :) ] to solve the problem with the R stem() function that
>> I mentioned in my previous email?
>>
>
> what about using the pydoc string ?
>
> import rpy2.robjects as ro
> help(ro.RObject.r_repr)
>
>
> The R "stem" function only has side-effects: it does not return a string,
> and does not provide an option to return a string.
> Whether this is to be considered unfortunate or not should be discussed on
> the r-devel mailing list.
>
> On win32, the console I/O functions are currently not working (so "stem"
> will not produce anything on that platform).
> http://rpy.sourceforge.net/rpy2/doc/html/overview.html#test-an-installation
>
> You may consider using R's sink function in order to circumvent both the
> fact that "stem" is not returning anything and that I/O is problematic
> under win32.
>
>
> Thanks in advance.
>> (I will read the the fixes to the doc is in SVN as soon as possible.)
>>
>
> 2.0.1 will have it, and should be out before Christmas.
>
>
>
>> 2008/12/16 Laurent Gautier <lgaut...@gmail.com <mailto:lgaut...@gmail.com
>> >>
>>
>>
>> The API changed between the moment this was first written and the
>> release 2.0.0.
>>
>> You want:
>> letters.r_repr()
>>
>> (the fix to the doc is in SVN for one or two days).
>>
>>
>> L.
>>
>>
>>
>>
>> Marcos Silva wrote:
>>
>> Hi People,
>>
>> What is wrong with these two piece of code?
>>
>> The following is an example presented in RPy2 manual
>>
>> >>> import rpy2.robjects as robjects
>> >>> letters = robjects.r['letters']
>> >>> letters
>> <RVector - Python:0x013253F0 / R:0x02435198>
>> >>> print letters
>> [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o"
>> "p" "q" "r" "s"
>> [20] "t" "u" "v" "w" "x" "y" "z"
>> >>> rcode = 'paste(%s, collapse="-")' %(repr(letters))
>> >>> robjects.r(rcode)
>> Traceback (most recent call last):
>> File "<interactive input>", line 1, in <module>
>> File "C:\Program
>> Files\Python25\Lib\site-packages\rpy2\robjects\__init__.py",
>> line 522, in __call__
>> p = self.parse(text=string)
>> File "C:\Program
>> Files\Python25\Lib\site-packages\rpy2\robjects\__init__.py",
>> line 413, in __call__
>> res = super(RFunction, self).__call__(*new_args, **new_kwargs)
>> RRuntimeError: Erro em function (file = "", n = NULL, text =
>> NULL, prompt = "?", srcfile = NULL, :
>> unexpected '<' in "paste(<"
>>
>> >>
>>
>> And this is a trying of using the stem() R function:
>>
>> >>> import rpy2.robjects as ro
>> >>> x = ro.FloatVector([32, 45, 28, 76, 29, 46, 18, 75, 86, 95,
>> 74, 46, 39, 76, 126])
>> >>> x
>> <FloatVector - Python:0x013173F0 / R:0x02435100>
>> >>> print x
>> [1] 32 45 28 76 29 46 18 75 86 95 74 46 39 76 126
>> >>> stem = ro.r['stem']
>> >>> stem(x)
>> <RObject - Python:0x013174E0 / R:0x011724A0>
>> >>> print stem(x)
>> NULL
>> >>>
>>
>> Any idea of what is wrong?
>>
>>
>>
>>
>>
>> -- Marcos F. Silva
>> http://marcosfs2006.googlepages.com
>>
>>
>>
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>>
>>
>>
>> --
>> Marcos F. Silva
>> http://marcosfs2006.googlepages.com
>>
>
>
--
Marcos F. Silva
http://marcosfs2006.googlepages.com
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