Question

您好我正在尝试将此功能转换为pandas，因为我不熟悉R

sum(data_file$finished_race_date >= 0, na.rm = TRUE)/sum(data_file$signup_race_date >= 0, na.rm = TRUE)

我想弄清楚比赛中有多少比赛的选手

Answer 1

如果需要将True值除以notnull比较的2个布尔值掩码：

100 * data_file.finished_race_date.notnull().sum()/data_file.signup_race_date.notnull().sum()

样品：

import pandas as pd
import numpy as np

data_file = pd.DataFrame({'finished_race_date':['2/5/16',np.nan,np.nan],
                          'signup_race_date':[np.nan,'2/5/16','2/5/16']})

print (data_file)
  finished_race_date signup_race_date
0             2/5/16              NaN
1                NaN           2/5/16
2                NaN           2/5/16

print (data_file.finished_race_date.notnull())
0     True
1    False
2    False
Name: finished_race_date, dtype: bool

print (data_file.finished_race_date.notnull().sum())
1

finished_race_date = data_file.finished_race_date.notnull().sum()
signup_race_date = data_file.signup_race_date.notnull().sum()

print (100 * finished_race_date / signup_race_date)
50.0

将R百分比方程转换为pandas

1 个答案: