Series Changes breaks rpy2? · Issue #5698 · pandas-dev/pandas (original) (raw)

It seems that the changes to to Series break the data conversion to R: running this Notebook doesn't work anymore with some dev version from last week:
https://gist.github.com/kevindavenport/7771325/raw/87ab5603f406729c6a3866f95af9a1ebfedcf619/Mahalanobis_Outliers.ipynb

The resulting error is this:

#xydata=pandas.DataFrame(...)

ValueError Traceback (most recent call last) in () ----> 1 get_ipython().run_cell_magic(u'R', u'-i xydata,xycols # list object to be transferred to python here', u'install.packages("ggplot2") # Had to add this for some reason, shouldn't be necessary\nlibrary(ggplot2)\ndf = data.frame(xydata)\nnames(df) <- c(xycols)\nprint(head(df))\nplot = ggplot(df, aes(x = X, y = Y)) + \ngeom_point(alpha = .8, color = 'dodgerblue',size = 5) +\ngeom_point(data=subset(df, Y >= 6.7 | X >= 4), color = 'red',size = 6) +\ntheme(axis.text.x = element_text(size= rel(1.5),angle=90, hjust=1)) +\nggtitle('Distance Pairs with outliers highlighted in red')\nprint(plot)')

C:\portabel\Python27\lib\site-packages\IPython\core\interactiveshell.pyc in run_cell_magic(self, magic_name, line, cell) 2141 magic_arg_s = self.var_expand(line, stack_depth) 2142 with self.builtin_trap: -> 2143 result = fn(magic_arg_s, cell) 2144 return result 2145

C:\portabel\Python27\lib\site-packages\IPython\extensions\rmagic.py in R(self, line, cell, local_ns)

C:\portabel\Python27\lib\site-packages\IPython\core\magic.pyc in (f, *a, **k) 191 # but it's overkill for just that one bit of state. 192 def magic_deco(arg): --> 193 call = lambda f, *a, **k: f(*a, **k) 194 195 if callable(arg):

C:\portabel\Python27\lib\site-packages\IPython\extensions\rmagic.py in R(self, line, cell, local_ns) 585 except KeyError: 586 raise NameError("name '%s' is not defined" % input) --> 587 self.r.assign(input, self.pyconverter(val)) 588 589 if getattr(args, 'units') is not None:

C:\portabel\Python27\lib\site-packages\rpy2\robjects\functions.pyc in call(self, *args, **kwargs) 84 v = kwargs.pop(k) 85 kwargs[r_k] = v ---> 86 return super(SignatureTranslatedFunction, self).call(*args, **kwargs)

C:\portabel\Python27\lib\site-packages\rpy2\robjects\functions.pyc in call(self, *args, **kwargs) 29 30 def call(self, *args, **kwargs): ---> 31 new_args = [conversion.py2ri(a) for a in args] 32 new_kwargs = {} 33 for k, v in kwargs.iteritems():

C:\portabel\Python27\lib\site-packages\rpy2\robjects\pandas2ri.pyc in pandas2ri(obj) 26 od[name] = StrVector(values) 27 else: ---> 28 od[name] = ro.conversion.py2ri(values) 29 return DataFrame(od) 30 elif isinstance(obj, PandasIndex):

C:\portabel\Python27\lib\site-packages\rpy2\robjects\pandas2ri.pyc in pandas2ri(obj) 49 else: 50 # converted as a numpy array ---> 51 res = original_conversion(obj) 52 # "index" is equivalent to "names" in R 53 if obj.ndim == 1:

C:\portabel\Python27\lib\site-packages\rpy2\robjects\numpy2ri.pyc in numpy2ri(o) 56 raise(ValueError("Unknown numpy array type.")) 57 else: ---> 58 res = ro.default_py2ri(o) 59 return res 60

C:\portabel\Python27\lib\site-packages\rpy2\robjects_init_.pyc in default_py2ri(o) 146 res = rinterface.SexpVector([o, ], rinterface.CPLXSXP) 147 else: --> 148 raise(ValueError("Nothing can be done for the type %s at the moment." %(type(o)))) 149 return res 150

ValueError: Nothing can be done for the type <class 'pandas.core.series.Series'> at the moment.

I'm not sure if this is something pandas cares, but even if not it would be nice to mention it in the release notes.