U1and0のブックマーク - はてなブックマーク

Indexing and selecting data — pandas 2.2.2 documentation
Indexing and selecting data# The axis labeling information in pandas objects serves many purposes: Identifies data (i.e. provides metadata) using known indicators, important for analysis, visualization, and interactive console display. Enables automatic and explicit data alignment. Allows intuitive getting and setting of subsets of the data set. In this section, we will focus on the final point: n
U1and0 2019/06/25
“if you try to use attribute access to create a new column, it creates a new attribute rather than a new column. In 0.21.0 and later, this will raise a UserWarning: In [1]: df = pd.DataFrame({'one': [1., 2., 3.]}) In [2]: df.two = [4, 5, 6] UserWarning: Pandas doesn't allow Series to be assigned i

python

pandas
リンク
https://pandas.pydata.org/pandas-docs/stable/style.html
U1and0 2019/01/08
making color table “df.style.applymap(color_negative_red)”

pandas

apply

python
リンク
Intro to Data Structures — pandas 0.23.0 documentation
Table Of Contents What’s New Installation Contributing to pandas Package overview 10 Minutes to pandas Tutorials Cookbook Intro to Data Structures Series Series is ndarray-like Series is dict-like Vectorized operations and label alignment with Series Name attribute DataFrame From dict of Series or dicts From dict of ndarrays / lists From structured or record array From a list of dicts From a dict
U1and0 2018/06/17
“p.to_xarray() Out[150]: <xarray.DataArray (items: 3, major_axis: 30, minor_axis: 4)>”

MultiIndex

Panel

pandas

python
リンク
http://pandas.pydata.org/pandas-docs/stable/advanced.html
U1and0 2018/06/17
“In [8]: iterables = [['bar', 'baz', 'foo', 'qux'], ['one', 'two']] In [9]: pd.MultiIndex.from_product(iterables, names=['first', 'second']) Out[9]: ”

MultiIndex

pandas

python
リンク
https://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.searchsorted.html
U1and0 2017/12/27
入れるべき値のインデックスを探す

pandas

searchsorted
リンク
https://pandas.pydata.org/pandas-docs/stable/options.html
U1and0 2017/12/23
dfの中身全部見せたいとき“In [3]: pd.options.display.max_rows = 999 In [4]: pd.options.display.max_rows Out[4]: 999”

jupyter

pandas

python
リンク
pandas.formats.style.Styler.format — pandas 0.18.1 documentation
Table Of Contents What’s New Installation Contributing to pandas Frequently Asked Questions (FAQ) Package overview 10 Minutes to pandas Tutorials Cookbook Intro to Data Structures Essential Basic Functionality Working with Text Data Options and Settings Indexing and Selecting Data MultiIndex / Advanced Indexing Computational tools Working with missing data Group By: split-apply-combine Merge, join
U1and0 2017/12/21
pandas

python

str

format
リンク
https://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.to_dict.html
U1and0 2017/11/04
DataFrameを様々な方法でdictionary化する

DataFrame

dictionary

pandas

python
リンク
Visualization — pandas 0.18.1 documentation
Table Of Contents What’s New Installation Contributing to pandas Frequently Asked Questions (FAQ) Package overview 10 Minutes to pandas Tutorials Cookbook Intro to Data Structures Essential Basic Functionality Working with Text Data Options and Settings Indexing and Selecting Data MultiIndex / Advanced Indexing Computational tools Working with missing data Group By: split-apply-combine Merge, join
U1and0 2016/10/26
In [31]: df.diff().hist(color='k', alpha=0.5, bins=50)

pandas

matplotlib

python
リンク
http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.sort_index.html
U1and0 2016/09/06
カラムをソートしたいときはdf.sort_index(axis=1), インデックスをソートしたいときはdf.sort_index(axis=0)

python

pandas

index

sort
リンク
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