熊猫：按行条件填写新列

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()

如何创建新列，表明value介于lower和upper之间？

Answer 1

您可以将between用于此目的。

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