我有以下数据框:
df = pd.DataFrame({'a': [2.85,3.11,3.3,3.275,np.NaN,4.21], 'b': [3.65,3.825,3.475,np.NaN,4.10,2.73],
'c': [4.3,3.08,np.NaN,2.40, 3.33, 2.48]}, index=pd.date_range('2019-01-01', periods=6,
freq='M'))
This gives the dataframe as below:
a b c
2019-01-31 2.850 3.650 4.30
2019-02-28 3.110 3.825 3.08
2019-03-31 3.300 3.475 NaN
2019-04-30 3.275 NaN 2.40
2019-05-31 NaN 4.100 3.33
2019-06-30 4.210 2.730 2.48
Expected:
a b c
2019-01-31 2.850 3.650 4.30
2019-02-28 3.110 3.825 3.08
2019-03-31 3.300 3.475 **3.69**
2019-04-30 3.275 **3.650** 2.40
2019-05-31 **3.220** 4.100 3.33
2019-06-30 4.210 2.730 2.48
我想用3个月的滚动平均值代替NaN值。我该怎么办?
答案 0 :(得分:0)
如果您将NaN
设为0,则可以执行以下操作:
df.fillna(0,inplace=True)
df.rolling(3).mean()
这将为您提供:
a b c
2019-01-31 NaN NaN NaN
2019-02-28 NaN NaN NaN
2019-03-31 3.086667 3.650000 2.460000
2019-04-30 3.228333 2.433333 1.826667
2019-05-31 2.191667 2.525000 1.910000
2019-06-30 2.495000 2.276667 2.736667