为什么当我除法时返回"index 0 is out of bound for axel0 with size 0“，但它可以用于减法？(argrelextrema，pandas)

import numpy as np
from scipy.signal import argrelextrema

# 示例数组，假设为空数组
data = np.array([])

# 判断数组是否为空
if data.size > 0:
    # 查找极值点
    extrema_indices = argrelextrema(data, np.greater)
    print("极值点的索引：", extrema_indices)
else:
    print("数组为空，无法查找极值点")

import pandas as pd

# 示例数据，假设为一个DataFrame
df = pd.DataFrame({'value': [1, 2, 3, 2, 1]})

# 计算滚动窗口的最小值和最大值
df['min'] = df['value'].rolling(window=3, min_periods=1).min()
df['max'] = df['value'].rolling(window=3, min_periods=1).max()

print("滚动窗口的最小值和最大值：")
print(df)