Python 熊猫中多索引数据帧的累积百分比
我想计算熊猫中多索引数据帧的累积百分比,但无法使其工作Python 熊猫中多索引数据帧的累积百分比,python,pandas,Python,Pandas,我想计算熊猫中多索引数据帧的累积百分比,但无法使其工作 import pandas as pd to_df = {'domain': {(12, 12): 2, (14, 14): 1, (15, 15): 2, (15, 17): 2, (17, 17): 1}, 'time': {(12, 12): 1, (14, 14): 1, (15, 15): 2, (15, 17): 1, (17, 17): 1}, 'weight': {(12, 12): 3, (14, 14): 4,
import pandas as pd
to_df = {'domain': {(12, 12): 2, (14, 14): 1, (15, 15): 2, (15, 17): 2, (17, 17): 1},
'time': {(12, 12): 1, (14, 14): 1, (15, 15): 2, (15, 17): 1, (17, 17): 1},
'weight': {(12, 12): 3,
(14, 14): 4,
(15, 15): 1,
(15, 17): 2,
(17, 17): 5}}
df = pd.DataFrame.from_dict(to_df)
domain time weight
12 12 2 1 3
14 14 1 1 4
15 15 2 2 1
17 2 1 2
17 17 1 1 5
df = df.groupby(['time', 'domain']).apply(
pd.DataFrame.sort_values, 'weight', ascending=True)
cumsum()按预期工作
df["cum_sum_time_domain"] = df.groupby(['time', 'domain'])['weight'].cumsum()
domain time weight cum_sum_time_domain
time domain
1 1 14 14 1 1 4 4
17 17 1 1 5 9
2 15 17 2 1 2 2
12 12 2 1 3 5
2 2 15 15 2 2 1 1
运行这些命令本身是可行的
df.groupby(['time', 'domain']).weight.sum()
df.groupby(['time', 'domain'])['weight'].sum()
然而,这两项任务突然产生了“南”
df["sum_time_domain"] = df.groupby(['time', 'domain']).weight.sum()
df
df["sum_time_domain"] = df.groupby(['time', 'domain'])['weight'].sum()
df
将这两者结合起来会出现错误:“未实现在多索引上合并多个级别重叠”
df["cum_perc_time_domain"] = 100 * df.groupby(['time', 'domain'])['weight'].cumsum() / df.groupby(
['time', 'domain'])['weight'].sum()
我想你需要有sum
。此外,对于排序groupby
,也不需要,请仅使用:
df = df.sort_values(['time','domain','weight'])
print (df.groupby(['time', 'domain']).weight.transform('sum'))
14 14 9
17 17 9
15 17 5
12 12 5
15 15 1
Name: weight, dtype: int64
df["cum_perc_time_domain"] = 100 * df.groupby(['time', 'domain'])['weight'].cumsum() /
df.groupby(['time', 'domain']).weight.transform('sum')
print (df)
domain time weight cum_perc_time_domain
14 14 1 1 4 44.444444
17 17 1 1 5 100.000000
15 17 2 1 2 40.000000
12 12 2 1 3 100.000000
15 15 2 2 1 100.000000