Python 带有方程和 R2 文本的 Seaborn 嵌入
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Seaborn implot with equation and R2 text
提问by user3287545
In my regular data analysis work, I have switched to use 100% python since the seaborn package becomes available. Big thanks to this wonderful package. However, One excel-chart feature I miss is to display the polyfit equation and/or R2 value when use the lmplot() function. Does anyone know an easy way to add that?
在我的常规数据分析工作中，自从 seaborn 包可用后，我已改用 100% python。非常感谢这个精彩的包裹。但是，我想念的一个 excel 图表功能是在使用 lmplot() 函数时显示 polyfit 方程和/或 R2 值。有谁知道一种简单的方法来添加它？
回答by mwaskom
It can't be done automatically with lmplotbecause it's undefined what that value should correspond to when there are multiple regression fits (i.e. using a hue, rowor colvariable.
它不能自动完成，lmplot因为当存在多重回归拟合时（即使用hue,row或col变量。
But this is part of the similar jointplotfunction. By default it shows the correlation coefficient and p value:
但这是类似jointplot功能的一部分。默认情况下，它显示相关系数和 p 值：
import seaborn as sns
import numpy as np
x, y = np.random.randn(2, 40)
sns.jointplot(x, y, kind="reg")
But you can pass any function. If you want R^2, you could do:
但是你可以传递任何函数。如果你想要 R^2，你可以这样做：
from scipy import stats
def r2(x, y):
return stats.pearsonr(x, y)[0] ** 2
sns.jointplot(x, y, kind="reg", stat_func=r2)
