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BUG: column with type float32 is skipped by rolling #43175

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Closed
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jason-xuan opened this issue Aug 23, 2021 · 1 comment
Closed
1 of 3 tasks

BUG: column with type float32 is skipped by rolling #43175

jason-xuan opened this issue Aug 23, 2021 · 1 comment
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@jason-xuan
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jason-xuan commented Aug 23, 2021

  • I have checked that this issue has not already been reported.

  • I have confirmed this bug exists on the latest version of pandas.

  • (optional) I have confirmed this bug exists on the master branch of pandas.


Note: Please read this guide detailing how to provide the necessary information for us to reproduce your bug.

Code Sample, a copy-pastable example

In [1]: import pandas as pd
   ...: import numpy as np
   ...: arr = np.zeros((5,5))
   ...: df = pd.DataFrame(arr)
   ...: df[3] = 1
   ...: df[3] = df[3].astype(np.float32)
   ...: df.rolling(2, axis=1).max()
Out[1]:
    0    1    2    4
0 NaN  0.0  0.0  0.0
1 NaN  0.0  0.0  0.0
2 NaN  0.0  0.0  0.0
3 NaN  0.0  0.0  0.0
4 NaN  0.0  0.0  0.0

In [2]: df[3] = df[3].astype(np.float64)
   ...: df.rolling(2, axis=1).max()
Out[2]:
    0    1    2    3    4
0 NaN  0.0  0.0  1.0  1.0
1 NaN  0.0  0.0  1.0  1.0
2 NaN  0.0  0.0  1.0  1.0
3 NaN  0.0  0.0  1.0  1.0
4 NaN  0.0  0.0  1.0  1.0

Problem description

It seems that the column with type float32 is skipped by the operation rolling.

Expected Output

Output of pd.show_versions()

INSTALLED VERSIONS

commit : 5f648bf
python : 3.8.10.final.0
python-bits : 64
OS : Linux
OS-release : 4.15.0-123-generic
Version : #126-Ubuntu SMP Wed Oct 21 09:40:11 UTC 2020
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8

pandas : 1.3.2
numpy : 1.20.3
pytz : 2021.1
dateutil : 2.8.2
pip : 21.2.4
setuptools : 57.4.0
Cython : 0.29.24
pytest : 6.2.4
hypothesis : None
sphinx : 4.1.2
blosc : None
feather : None
xlsxwriter : 3.0.1
lxml.etree : 4.6.3
html5lib : 1.1
pymysql : None
psycopg2 : None
jinja2 : 2.11.3
IPython : 7.26.0
pandas_datareader: None
bs4 : 4.9.3
bottleneck : 1.3.2
fsspec : 2021.07.0
fastparquet : None
gcsfs : None
matplotlib : 3.4.3
numexpr : 2.7.3
odfpy : None
openpyxl : 3.0.7
pandas_gbq : None
pyarrow : None
pyxlsb : None
s3fs : None
scipy : 1.7.1
sqlalchemy : 1.4.23
tables : 3.6.1
tabulate : None
xarray : None
xlrd : 2.0.1
xlwt : 1.3.0
numba : 0.53.1

@jason-xuan jason-xuan added Bug Needs Triage Issue that has not been reviewed by a pandas team member labels Aug 23, 2021
@phofl
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phofl commented Aug 23, 2021

Duplicate of #42452

@phofl phofl marked this as a duplicate of #42452 Aug 23, 2021
@phofl phofl closed this as completed Aug 23, 2021
@phofl phofl added Duplicate Report Duplicate issue or pull request and removed Bug Needs Triage Issue that has not been reviewed by a pandas team member labels Aug 23, 2021
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