我想获得一个数据框，其中数据代表每个类的不同类和每月频率。例如，在以下数据框中，想要使用列Forma来获取表示列的每个类的月频率的数据帧，例如获取数据帧df1
df
Evento Forma Excentricidad
Fecha
2004-04-09 22:45:00 1 MBCCM 0.7
2004-04-12 22:45:00 2 MBSCL 0.6
2004-04-24 03:45:00 3 SCL 0.4
2004-05-02 06:45:00 4 SCL 0.5
2004-05-30 04:45:00 5 MBCCM 0.9
2004-05-31 03:15:00 6 MBCCM 0.8
2004-06-08 00:15:00 7 MBSCL 0.6
2004-06-12 22:15:00 8 CCM 1.0
2004-06-13 02:45:00 9 MBCCM 0.8
2004-06-13 23:45:00 10 MBSCL 0.6
2004-06-14 03:15:00 11 MBSCL 0.6
2004-06-17 08:15:00 12 MBCCM 0.7
2004-06-17 11:45:00 13 MBCCM 0.7
2004-06-22 00:15:00 14 SCL 0.5
2004-06-22 07:45:00 15 MBCCM 0.9
2004-06-22 22:45:00 16 CCM 0.8
2004-07-01 05:15:00 17 MBCCM 0.8
2004-07-02 00:15:00 18 MBSCL 0.6
2004-07-04 11:45:00 19 MBCCM 0.9
2004-07-06 03:45:00 20 SCL 0.6
2004-07-07 04:15:00 21 CCM 0.9
2004-07-08 02:45:00 22 MBCCM 1.0
2004-07-08 11:45:00 23 MBCCM 0.8
2004-07-08 02:15:00 24 MBCCM 0.9
2004-07-09 04:45:00 25 CCM 0.7
2004-07-11 18:15:00 26 MBSCL 0.4
2004-07-11 23:15:00 27 MBSCL 0.3
2004-07-15 10:45:00 28 CCM 0.8
2004-07-16 12:15:00 29 MBCCM 0.8
2004-07-17 02:15:00 30 MBCCM 0.8
2004-07-17 05:45:00 31 MBCCM 0.7
2004-07-19 23:15:00 32 CCM 0.9
2004-07-20 09:15:00 33 CCM 0.7
2004-07-20 21:45:00 34 SCL 0.6
2004-07-23 03:45:00 35 SCL 0.6
2004-07-23 12:45:00 36 MBCCM 0.9
2004-07-24 00:45:00 37 CCM 0.7
2004-07-26 00:15:00 38 MBCCM 0.8
2004-07-27 05:15:00 39 MBSCL 0.6
2004-07-27 07:15:00 40 MBSCL 0.6
2004-07-27 14:15:00 41 MBCCM 0.7
2004-07-27 19:45:00 42 SCL 0.6
2004-07-27 23:15:00 43 MBSCL 0.6
2004-07-28 07:15:00 44 MBCCM 0.8
2004-07-30 05:15:00 45 MBCCM 0.7
2004-07-31 00:15:00 46 SCL 0.5
2004-07-31 04:15:00 47 MBSCL 0.6
DF1
Tipo Abril Mayo Junio Julio Agosto Septiembre Octubre
MCC 2 9 8 1 5 6 3
CCM 7 11 23 12 7 2 4
MBCCM 4 8 4 1 3 4 2
SCL 1 7 2 4 1 9 5
MBSCL 6 3 7 1 9 3 10
我怎么能这样做，来自df？
答案 0 :(得分：4)
import pandas as pd
df = pd.read_table('data', sep='\s{2,}')
df.index = pd.to_datetime(df.index)
df['Month'] = [date.strftime('%B') for date in df.index]
print(pd.crosstab(rows=[df['Forma']], cols=[df['Month']], margins=False))
产量
Month April July June May
Forma
CCM 0 6 2 0
MBCCM 1 13 4 2
MBSCL 1 7 3 0
SCL 1 5 1 1