matplotlib：每个类别的箱线图

Question

我的 pandas 数据框有两列：category 和 duration。和我使用以下代码绘制所有数据点的箱线图。

import matplotlib.pyplot as plt
plt.boxplot(df.duration)
plt.show()

但是，如果我想要每个 category 一个盒子，我该如何修改上面的代码？谢谢！

Answer 1

我们可以用 pandas

#df=pd.DataFrame({'category':list('aacde'),'duration':[1,3,2,3,4]}) sample data
df.assign(index=df.groupby('category').cumcount()).pivot('index','category','duration').plot(kind='box')

Answer 2

除了, which is spot on, you might want to check out the seaborn library。就是为了做这种剧情。

Seaborn is a Python visualization library based on matplotlib. It provides a high-level interface for drawing attractive statistical graphics.

勾选documentation for boxplots

Draw a box plot to show distributions with respect to categories.

sns.boxplot(data=df, x='category', y='duration')

matplotlib：每个类别的箱线图

matplotlib: box plot for each category

matplotlib

boxplot

pandas