Description
Pandas version checks
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I have checked that this issue has not already been reported.
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I have confirmed this bug exists on the latest version of pandas.
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I have confirmed this bug exists on the main branch of pandas.
Reproducible Example
import pandas as pd
index = ['2019-01-03 05:11', '2019-01-03 05:23',
'2019-01-03 05:28', '2019-01-03 05:32',
'2019-01-03 05:36']
arr= [True, False, False, True, True]
df = pd.DataFrame({'arr': arr}, index=pd.to_datetime(index).astype('datetime64[us]'))
print(df.rolling('5min').sum())
arr
2019-01-03 05:11:00 1.0
2019-01-03 05:23:00 1.0
2019-01-03 05:28:00 1.0
2019-01-03 05:32:00 2.0
2019-01-03 05:36:00 3.0df = pd.DataFrame({'arr': arr}, index=pd.to_datetime(index).astype('datetime64[ms]'))
print(df.rolling('5min').sum())
arr
2019-01-03 05:11:00 1.0
2019-01-03 05:23:00 1.0
2019-01-03 05:28:00 1.0
2019-01-03 05:32:00 2.0
2019-01-03 05:36:00 3.0Issue Description
Output of rolling window operations for timeseries such as sum or count is wrong when the index is of type is not 'datetime64[ns]'.
Expected Behavior
df = pd.DataFrame({'arr': arr}, index=pd.to_datetime(index).astype('datetime64[ns]'))
print(df.rolling('5min').sum())
arr
2019-01-03 05:11:00 1.0
2019-01-03 05:23:00 0.0
2019-01-03 05:28:00 0.0
2019-01-03 05:32:00 1.0
2019-01-03 05:36:00 2.0
Installed Versions
INSTALLED VERSIONS
commit : e86ed37
python : 3.10.12.final.0
python-bits : 64
OS : Linux
OS-release : 5.15.120+
Version : #1 SMP Wed Aug 30 11:19:59 UTC 2023
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : en_US.UTF-8
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8
pandas : 2.1.1
numpy : 1.23.5
pytz : 2023.3.post1
dateutil : 2.8.2
setuptools : 67.7.2
pip : 23.1.2
Cython : 3.0.2
pytest : 7.4.1
hypothesis : None
sphinx : 5.0.2
blosc : None
feather : None
xlsxwriter : None
lxml.etree : 4.9.3
html5lib : 1.1
pymysql : None
psycopg2 : 2.9.7
jinja2 : 3.1.2
IPython : 7.34.0
pandas_datareader : 0.10.0
bs4 : 4.11.2
bottleneck : None
dataframe-api-compat: None
fastparquet : None
fsspec : 2023.6.0
gcsfs : 2023.6.0
matplotlib : 3.7.1
numba : 0.56.4
numexpr : 2.8.5
odfpy : None
openpyxl : 3.1.2
pandas_gbq : 0.17.9
pyarrow : 9.0.0
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : 1.11.2
sqlalchemy : 2.0.20
tables : 3.8.0
tabulate : 0.9.0
xarray : 2023.7.0
xlrd : 2.0.1
zstandard : None
tzdata : 2023.3
qtpy : None
pyqt5 : None