【2.5.4.2】statannot--boxplot显著性标注

更多案例： https://github.com/webermarcolivier/statannot/blob/master/example/example.ipynb

一、安装：

The latest stable release can be installed from PyPI:

pip install statannot
You may instead want to use the development version from Github:

pip install git+https://github.com/webermarcolivier/statannot.git

二、说明：

在boxplot中补充显著性差异

import statannot
statannot.add_stat_annotation(
    ax,
    data=df,
    x=x,
    y=y,
    hue=hue,
    box_pairs=[
        (("Biscoe", "Male"), ("Torgersen", "Female")),
        (("Dream", "Male"), ("Dream", "Female")),
    ],
    test="t-test_ind",
    text_format="star",
    loc="outside",
)

三、示例

案例1

代码

import seaborn as sns
from statannot import add_stat_annotation

df = sns.load_dataset("tips")
x = "day"
y = "total_bill"
order = ['Sun', 'Thur', 'Fri', 'Sat']
ax = sns.boxplot(data=df, x=x, y=y, order=order)
test_results = add_stat_annotation(ax, data=df, x=x, y=y, order=order,
                                   box_pairs=[("Thur", "Fri"), ("Thur", "Sat"), ("Fri", "Sun")],
                                   test='Mann-Whitney', text_format='star',
                                   loc='outside', verbose=2)
test_results

案例2

代码：

x = "color"
y = "price"
hue = "cut"
hue_order=['Ideal', 'Premium', 'Good', 'Very Good', 'Fair']
box_pairs=[
    (("E", "Ideal"), ("E", "Very Good")),
    (("E", "Ideal"), ("E", "Premium")),
    (("E", "Ideal"), ("E", "Good")),
    (("I", "Ideal"), ("I", "Premium")),
    (("I", "Ideal"), ("I", "Good")),
    (("J", "Ideal"), ("J", "Premium")),
    (("J", "Ideal"), ("J", "Good")),
    (("E", "Good"), ("I", "Ideal")),
    (("I", "Premium"), ("J", "Ideal")),
    ]
ax = sns.boxplot(data=df, x=x, y=y, hue=hue,)
add_stat_annotation(ax, data=df, x=x, y=y, hue=hue, box_pairs=box_pairs,
                    test='Mann-Whitney', loc='inside', verbose=2)
plt.legend(loc='upper left', bbox_to_anchor=(1.03, 1))
plt.savefig('example_hue_layout.png', dpi=300, bbox_inches='tight')

参考资料：

• https://bbquercus.medium.com/adding-statistical-significance-asterisks-to-seaborn-plots-9c8317383235
• https://github.com/webermarcolivier/statannot