Question

我的数据框如下：

                   POSITIVE  NEGATIVE  MASTER Net Positivity
Speaker                                                     
Mike                 36.0      29.0  2187.0          0.32%
Rob                  36.0      35.0  2413.0          0.04%
May                   2.0       4.0   369.0         -0.54%

我想在末尾添加一行，总行数为正（36 + 36 + 2），总行数为负（29 + 35 + 4），总行数（2187 + 2413 + 369）。新行的索引应为“ TOTAL”。总净阳性为（总阳性-阴性总）/总MASTER。

                   POSITIVE  NEGATIVE  MASTER Net Positivity
Speaker                                                     
Mike                 36.0      29.0  2187.0          0.32%
Rob                  36.0      35.0  2413.0          0.04%
May                   2.0       4.0   369.0         -0.54%
TOTAL                74.0      68.0  4969.0          0.12%

我应该如何在熊猫中添加总行数？

Answer 1

您可以简单地

DateTime startTimeStr = DateTime.Parse("2020-04-21T21:44:34Z");

Answer 2

尝试一下：

df = df.append(df.sum(numeric_only=True), ignore_index=True)
df['Net_Positivity'] = (df['POSITIVE']-df['NEGATIVE'])*100/df['MASTER']
df['Speaker'].fillna('Total', inplace=True)
df.set_index('Speaker', inplace=True)
print(df)

         POSITIVE  NEGATIVE  MASTER  Net_Positivity
Speaker
Mike         36.0      29.0  2187.0        0.320073
Rob          36.0      35.0  2413.0        0.041442
May           2.0       4.0   369.0       -0.542005
Total        74.0      68.0  4969.0        0.120749

Answer 3

您可以使用loc在df上添加行和sum。然后以正确的格式计算净正数

df.loc['total'] = df.iloc[:, :-1].sum()
df.loc['total', 'Net Positivity'] = f"""{(df.loc['total', 'POSITIVE']
                                            - df.loc['total', 'NEGATIVE'])
                                          /df.loc['total', 'MASTER']:.2%}"""

         POSITIVE  NEGATIVE  MASTER Net Positivity
Speaker                                           
Mike         36.0      29.0  2187.0          0.32%
Rob          36.0      35.0  2413.0          0.04%
May           2.0       4.0   369.0         -0.54%
total        74.0      68.0  4969.0          0.12%

将TOTAL行添加到熊猫数据框

3 个答案: