熊貓：由條件逐行

Question

import pandas as pd 
import numpy as np 

df = pd.DataFrame([np.random.rand(100),100*[0.1],100*[0.3]]).T 
df.columns = ["value","lower","upper"] 

df.head() 

如何創建一個新列表明value是lower和upper之間填充新列？

Answer 1

您可以使用between來實現此目的。

df['new_col'] = df['value'].between(df['lower'], df['upper'])