请问我如何在这个数据框上绘制折线图，我想在折线图中显示每月的出勤总和
Please how can i plot a line graph on this data frame, I want to show the sum of attendance on a monthly basis in line graph
visit_date
sex
age
marital_status
0 2021-04-05
Female
66
Widowed
1 2021-04-05
Female
65
Widowed
2 2021-04-05
Female
39
Married
3 2021-04-05
Male
56
Married
4 2021-04-05
Female
31
Married
5 2021-04-05
Female
24
Single
6 2021-04-05
Male
37
Married
7 2021-04-05
Female
43
Widowed
8 2021-04-05
Male
29
Married
9 2021-04-05
Male
44
Single
如果我理解正确的话这应该有效
import pandas as pd
import matplotlib.pyplot as plt
df = pd.DataFrame(data)
df['visit_date'] = pd.to_datetime(df['visit_date'])
attendance = df.groupby(pd.Grouper(key="visit_date", freq='M')).size().reset_index(name='attendance')
attendance.plot(x='visit_date', y='attendance', kind='line')
plt.show()
| visit_date | sex | age | marital_status |
|---|---|---|---|
| 0 2021-04-05 | Female | 66 | Widowed |
| 1 2021-04-05 | Female | 65 | Widowed |
| 2 2021-04-05 | Female | 39 | Married |
| 3 2021-04-05 | Male | 56 | Married |
| 4 2021-04-05 | Female | 31 | Married |
| 5 2021-04-05 | Female | 24 | Single |
| 6 2021-04-05 | Male | 37 | Married |
| 7 2021-04-05 | Female | 43 | Widowed |
| 8 2021-04-05 | Male | 29 | Married |
| 9 2021-04-05 | Male | 44 | Single |
如果我理解正确的话这应该有效
import pandas as pd
import matplotlib.pyplot as plt
df = pd.DataFrame(data)
df['visit_date'] = pd.to_datetime(df['visit_date'])
attendance = df.groupby(pd.Grouper(key="visit_date", freq='M')).size().reset_index(name='attendance')
attendance.plot(x='visit_date', y='attendance', kind='line')
plt.show()