Pandas-16.聚合
以如下代码作为例子:
df = pd.DataFrame(np.random.randint(-10,10, (5,4)),
index = pd.date_range...('1/1/2020', periods=5),
columns = ['A', 'B', 'C', 'D'])
在整个数据窗口内应用聚合
print(df)
print(df.rolling...12.0 5.0 -4.0 -1.0
2020-01-04 -10.0 -3.0 2.0 -4.0
2020-01-05 -11.0 -20.0 6.0 -4.0
'''
DataFrame的单列进行聚合...8.0
2020-01-03 -12.0
2020-01-04 -10.0
2020-01-05 -11.0
Freq: D, Name: A, dtype: float64
'''
多列聚合