如何在我使用 seaborn 创建的散点图上添加一个圆圈 [重复]

Question

正如标题所说，我想在散点图上画一个圆圈

假设我有一个这样的 df

+--------+---------+------+
| X_GRID | Y_GRID  | GRP  |
+--------+---------+------+
|      1 |       0 | HOT  |
|      2 |      -1 | COLD |
|      1 |       2 | COLD |
|      2 |       1 | HOT  |
+--------+---------+------+

我用它来创建一个像这样的散点图

ax = sns.scatterplot(data=df, hue='GRP', x='X_GRID', y='Y_GRID')
ax.set(xlim=(-4, 4))
ax.set(ylim=(-4, 4))

我将如何在 (0,0) 附近的半径 = 2 的散点图周围强加一个红色圆圈（或任何颜色）？

Answer 1

引用自here

import pandas as pd
import seaborn as sns
df = pd.DataFrame()
df['X_GRID'] = [1,2,1,2]
df['Y_GRID'] = [0,-1,2,1]
df['GRP'] = ['HOT','COLD','COLD','HOT']
circle1 = plt.Circle(xy=(0, 0), radius=2, color='red', fill=False)
ax = sns.scatterplot(data=df, hue='GRP', x='X_GRID', y='Y_GRID')
ax.add_patch(circle1)
ax.set(xlim=(-4, 4))
ax.set(ylim=(-4, 4));