我必须按季节进行一些数据分析。
从2015年底到2017年下半年，我大约有一个半年的小时测量值。我要做的是按季节对这些数据进行排序。
以下是我正在处理的数据的示例：
Date,Year,Month,Day,Day week,Hour,Holiday,Week Day,Impulse,Power (kW),Temperature (C)
04/12/2015,2015,12,4,6,18,0,6,2968,1781,16.2
04/12/2015,2015,12,4,6,19,0,6,2437,1462,16.2
19/04/2016,2016,4,19,3,3,0,3,1348,809,14.4
19/04/2016,2016,4,19,3,4,0,3,1353,812,14.1
11/06/2016,2016,6,11,7,19,0,7,1395,837,18.8
11/06/2016,2016,6,11,7,20,0,7,1370,822,17.4
11/06/2016,2016,6,11,7,21,0,7,1364,818,17
11/06/2016,2016,6,11,7,22,0,7,1433,860,17.5
04/12/2016,2016,12,4,1,17,0,1,1425,855,14.6
04/12/2016,2016,12,4,1,18,0,1,1466,880,14.4
07/03/2017,2017,3,7,3,14,0,3,3668,2201,14.2
07/03/2017,2017,3,7,3,15,0,3,3666,2200,14
24/04/2017,2017,4,24,2,5,0,2,1347,808,11.4
24/04/2017,2017,4,24,2,6,0,2,1816,1090,11.5
24/04/2017,2017,4,24,2,7,0,2,2918,1751,12.4
15/06/2017,2017,6,15,5,13,1,1,2590,1554,22.5
15/06/2017,2017,6,15,5,14,1,1,2629,1577,22.5
15/06/2017,2017,6,15,5,15,1,1,2656,1594,22.1
15/11/2017,2017,11,15,4,13,0,4,3765,2259,15.6
15/11/2017,2017,11,15,4,14,0,4,3873,2324,15.9
15/11/2017,2017,11,15,4,15,0,4,3905,2343,15.8
15/11/2017,2017,11,15,4,16,0,4,3861,2317,15.3
如您所见，我拥有三个不同年份的数据。
我当时想做的是使用pd.to_datetime()命令转换第一列。然后根据天/月对行进行分组，而不考虑年份（以dd / mm为间隔）（如果冬天从21/12到21/03，则创建一个新的数据框，其中所有行的日期都为包括在此间隔中，而与年份无关），但是我不能通过忽略年份来做到这一点（这会使情况变得更加复杂）。
编辑： 所需的输出将是：
df_spring
Date,Year,Month,Day,Day week,Hour,Holiday,Week Day,Impulse,Power (kW),Temperature (C)
19/04/2016,2016,4,19,3,3,0,3,1348,809,14.4
19/04/2016,2016,4,19,3,4,0,3,1353,812,14.1
07/03/2017,2017,3,7,3,14,0,3,3668,2201,14.2
07/03/2017,2017,3,7,3,15,0,3,3666,2200,14
24/04/2017,2017,4,24,2,5,0,2,1347,808,11.4
24/04/2017,2017,4,24,2,6,0,2,1816,1090,11.5
24/04/2017,2017,4,24,2,7,0,2,2918,1751,12.4
df_autumn
Date,Year,Month,Day,Day week,Hour,Holiday,Week Day,Impulse,Power (kW),Temperature (C)
04/12/2015,2015,12,4,6,18,0,6,2968,1781,16.2
04/12/2015,2015,12,4,6,19,0,6,2437,1462,16.2
04/12/2016,2016,12,4,1,17,0,1,1425,855,14.6
04/12/2016,2016,12,4,1,18,0,1,1466,880,14.4
15/11/2017,2017,11,15,4,13,0,4,3765,2259,15.6
15/11/2017,2017,11,15,4,14,0,4,3873,2324,15.9
15/11/2017,2017,11,15,4,15,0,4,3905,2343,15.8
15/11/2017,2017,11,15,4,16,0,4,3861,2317,15.3
在剩余的季节中依此类推。
答案 0 :(得分：0)
使用Day和Month列过滤冬季相关的行来定义每个季节：
df_winter = df.loc[((df['Day'] >= 21) & (df['Month'] == 12)) | (df['Month'] == 1) | (df['Month'] == 2) | ((df['Day'] <= 21) & (df['Month'] == 3))]
答案 1 :(得分：0)
您可以简单地通过month.isin()过滤数据框
# spring
df[df['Month'].isin([3,4])]
Date Year Month Day Day week Hour Holiday Week Day Impulse Power (kW) Temperature (C)
2 19/04/2016 2016 4 19 3 3 0 3 1348 809 14.4
3 19/04/2016 2016 4 19 3 4 0 3 1353 812 14.1
10 07/03/2017 2017 3 7 3 14 0 3 3668 2201 14.2
11 07/03/2017 2017 3 7 3 15 0 3 3666 2200 14.0
12 24/04/2017 2017 4 24 2 5 0 2 1347 808 11.4
13 24/04/2017 2017 4 24 2 6 0 2 1816 1090 11.5
14 24/04/2017 2017 4 24 2 7 0 2 2918 1751 12.4
# autumn
df[df['Month'].isin([11,12])]
Date Year Month Day Day week Hour Holiday Week Day Impulse Power (kW) Temperature (C)
0 04/12/2015 2015 12 4 6 18 0 6 2968 1781 16.2
1 04/12/2015 2015 12 4 6 19 0 6 2437 1462 16.2
8 04/12/2016 2016 12 4 1 17 0 1 1425 855 14.6
9 04/12/2016 2016 12 4 1 18 0 1 1466 880 14.4
18 15/11/2017 2017 11 15 4 13 0 4 3765 2259 15.6
19 15/11/2017 2017 11 15 4 14 0 4 3873 2324 15.9
20 15/11/2017 2017 11 15 4 15 0 4 3905 2343 15.8
21 15/11/2017 2017 11 15 4 16 0 4 3861 2317 15.3