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The .apply() function does not work for resample function in this release.
Here a code sample to reproduce the error:
#### Code
import numpy as np
import pandas as pd
from pandas.io import sql
rng = pd.date_range('1/1/2011', periods=72, freq='30s')
df2 = pd.DataFrame(np.random.randn(72),index=rng)
x=df2.resample('60s',closed='right',convention='start')#.apply(np.median)
print x.shape
y=df2.resample('60s',closed='right',convention='start',how='median')
print y.shape
z=df2.resample('60s',closed='right',convention='start').apply(np.median)
print z.shape
print z
print('stop')
#### Output
(37, 1)
(37, 1)
(1,)
The function how='median' is deprecate and .apply(np.median)should be used. But
the result array when using the apply function always consists only of one
line, when running on Ubuntu Mate (16.04 LTS).
On other systems the usage of how=xxx and .apply(xxx) is equivalent.
** Affects: pandas (Ubuntu)
Importance: Undecided
Status: New
** Tags: dataframe pandas python
--
python-pandas 0.17.1-3ubuntu2 bug in functionality
https://bugs.launchpad.net/bugs/1728393
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