python - 如何为 pandas 数据框添加标题

Question

我有以下代码，可以使用 df.describe 为分类变量的每个类打印出描述性统计数据

for i in list(merged.Response.unique()):
  print(merged[(merged.Response==i)].describe().round(2))

它返回

       OrderCount  OrderAvgSize  AvgDeliverCost  AvgOrderValue  CustomerValue
count      687.00        687.00          687.00         687.00         687.00
mean        24.75         13.45            4.56           9.61         243.91
std          7.04          3.35            0.17           1.95         107.45
min         11.00          7.00            4.13           5.85          83.27
25%         20.00         11.00            4.45           8.18         167.44
50%         24.00         13.00            4.57           9.34         213.08
75%         29.00         15.00            4.67          10.51         289.74
max         51.00         24.00            4.97          15.75         700.80
       OrderCount  OrderAvgSize  AvgDeliverCost  AvgOrderValue  CustomerValue
count      1099.0       1099.00         1099.00        1099.00        1099.00
mean         17.2          6.85            4.08           5.18          97.88
std          12.8          2.47            0.24           1.45         101.26
min           1.0          2.00            3.24           2.40           5.72
25%           7.0          5.00            3.89           4.12          31.38
50%          14.0          7.00            4.13           5.21          62.58
75%          24.0          8.00            4.22           5.86         130.90
max          55.0         21.00            4.91          13.46         686.46
       OrderCount  OrderAvgSize  AvgDeliverCost  AvgOrderValue  CustomerValue
count      392.00        392.00          392.00         392.00         392.00
mean        12.41         11.46            4.44          10.13         125.04
std          3.75          3.34            0.19           1.94          43.91
min          3.00          6.00            4.02           6.98          36.92
25%         10.00          9.00            4.31           8.71          92.68
50%         13.00         10.00            4.38           9.30         121.58
75%         15.00         13.00            4.51          11.00         148.64
max         26.00         22.00            4.94          16.25         266.56

有什么方法可以为每个汇总表添加标题，以便我知道哪个类是哪个类？

我用 pandas styler 编写了以下内容，但是尽管给数据框起了标题，它只打印了其中一个，而且看起来不太好(顺便说一句，我在 google colab 中):

for i in list(merged.Response.unique()):
  test = merged[(merged.Response==i)].describe().round(2).style.set_caption(i)

test

                               AmznPrime
OrderCount  OrderAvgSize    AvgDeliverCost  AvgOrderValue   CustomerValue
count   392.000000  392.000000  392.000000  392.000000  392.000000
mean    12.410000   11.460000   4.440000    10.130000   125.040000
std 3.750000    3.340000    0.190000    1.940000    43.910000
min 3.000000    6.000000    4.020000    6.980000    36.920000
25% 10.000000   9.000000    4.310000    8.710000    92.680000
50% 13.000000   10.000000   4.380000    9.300000    121.580000
75% 15.000000   13.000000   4.510000    11.000000   148.640000
max 26.000000   22.000000   4.940000    16.250000   266.560000

感谢所有帮助。谢谢!

Answer 1

怎么样:

merged.groupby("Response").describe().round(2)

要匹配您的预期输出，请执行stack/unstack:

merged.groupby("Response").describe().stack(level=1).unstack(level=0)