matplotlib 如何在python中用颜色渐变按字母顺序绘制标签？

gblwokeq 于 2023-01-31 发布在 Python

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我想在python中用颜色梯度按字母顺序绘制标签“nutrition_grade_fr”。
下面是我的图的代码，但它没有按字母顺序显示标签，也没有相应的色调：

import seaborn as sns
import matplotlib.pyplot as plt 

df = nutri_app

for elem in ['energy_100g', 'sugars_100g','fat_100g','proteins_100g']:
#Create barplot
    fig, ax = plt.subplots(figsize=(30,6))
    sns.barplot(x="pnns_group1", y=elem, hue="nutrition_grade_fr", data=df)

#Add title
    ax.set_title(f"nutriscore by categories related to {elem} quantity variable")

#Show plot
    plt.show()

matplotlib

来源：https://stackoverflow.com/questions/75279117/how-to-plot-labels-in-alphabetical-orders-with-coulour-gradient-in-python

1条答案

按热度按时间

cqoc49vn1#

您需要pandas.DataFrame.sort_values并选择color palette（例如，蓝调）：

import seaborn as sns
import matplotlib.pyplot as plt 

df = nutri_app.sort_values(by='nutrition_grade_fr') #ascending=True by default

for elem in ['energy_100g', 'sugars_100g','fat_100g','proteins_100g']:
#Create barplot
    fig, ax = plt.subplots(figsize=(30,6))
    sns.barplot(x="pnns_group1", y=elem, hue="nutrition_grade_fr", data=df, palette='Blues')

#Add title
    ax.set_title(f"nutriscore by categories related to {elem} quantity variable")

#Show plot
plt.show();

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matplotlib 如何在python中用颜色渐变按字母顺序绘制标签？

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