examples not running, error in documentation

[columW]

Both examples do not run. In finance.py, on line 83:

 filledRatio = ibm / ibmMonthly.reindex(ibm.index, fillMethod='pad')

should be:

 filledRatio = ibm / ibmMonthly.reindex(ibm.index, method='pad')

As reindex is defined in core/series.py as

 def reindex(self, index=None, method=None):

This error is repeated in the documentation at http://pandas.sourceforge.net (reindex uses the argument fillMethod instead of method).

running regressions.py, I get the following error:

Traceback (most recent call last):
File "regressions.py", line 30, in
model = ols(y=Y, x=X)
File "/usr/local/lib/python2.6/dist-packages/pandas/stats/interface.py", line 117, in ols
return klass(**kwargs)
File "/usr/local/lib/python2.6/dist-packages/pandas/stats/ols.py", line 56, in init
self.sm_ols = sm.OLS(self._y_raw, self._x.values).fit()
AttributeError: 'module' object has no attribute 'OLS'

It's possible I'm somehow combining incompatible versions of pandas, but I don't see how, considering I downloaded pandas today, once. The first bug, at least seems like a simple code error.

Hopefully this is of some help,
Colum

[wesm]

Um, you installed pandas from the git repo or from PyPI (either is fine)? As you can see I haven't touched the examples in quite a while, and for example I removed the deprecated fillMethod argument from reindex very recently. I plan to make a pass through the docs in the next week or two to update them given all the work I've been putting in on the library. Thanks for letting me know about the examples, I'll take a look and fix them up to be in line with the present API.

The second error is rather weird. I would strongly suggest upgrading your scikits.statsmodels and trying again:

http://pypi.python.org/pypi/scikits.statsmodels/

Let me know

[wesm]

I updated the examples and the online docs per your comments. I need to write significantly more docs in the near future to document new features. Stay tuned.

Let me know if you're still having problems with regressions after you update statsmodels!

[columW]

I installed pandas from the git repo, and have updated scikits.statsmodels using easy_install. The error from regressions.py is the same. I'm using version scikits.statsmodels 0.3.0rc1.

[wesm]

Can you type

import scikits.statsmodels.api as api

into a python shell

then

api.OLS

and let me know what it says

[columW]

typing

import scikits.statsmodels.api as api

gives me

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.6/dist-packages/scikits.statsmodels-0.3.0rc1-py2.6.egg/scikits/statsmodels/api.py", line 1, in <module>
import iolib, datasets, tools
File "/usr/local/lib/python2.6/dist-packages/scikits.statsmodels-0.3.0rc1-py2.6.egg/scikits/statsmodels/iolib/__init__.py", line 1, in <module>
from foreign import StataReader, genfromdta, savetxt
File "/usr/local/lib/python2.6/dist-packages/scikits.statsmodels-0.3.0rc1-py2.6.egg/scikits/statsmodels/iolib/foreign.py", line 16, in <module>
from numpy.lib._iotools import _is_string_like, easy_dtype

easy_dtype does exist in lib._iotools in the current version of numpy, but not in the version I have, installed using apt-get (I think I have 1.3.0).
I'll install the current version of numpy, and see if that works.

Thanks for the help!

[wesm]

Ah, that is indeed the problem. See about upgrading to NumPy 1.6. The issue was that I caught an ImportError in pandas when the import convention from statsmodels changed. I can probably get rid of that which will make these errors easier to spot