如何在panda dataframe中互换行和列
如何在panda dataframe中互换行和列
提问于 2021-02-21 21:19:49
我正在使用pandas库读取csv文件。我想交换行和列，但主要问题是状态列..there在此column....so中每三行之后重复值转置是将所有行值转换为columns...but，我只需要三列...即确认，康复，死亡的每一天。请找到附件，在那里我已经显示了样本输入以及样本输出。enter image description here
回答 1
Stack Overflow用户
发布于 2021-02-22 02:59:27
这是一个使用stack()和unstack()的例子
import random
s = 10
d = pd.date_range("01-Jan-2021", periods=s)
cols = ["TT","AN","AP"]
df = pd.DataFrame([{**{"Date":dd, "Status":st}, **{c:random.randint(1,50) for c in cols}}
for dd in d
for st in ["Confirmed","Recovered","Deceased"]])
df.set_index(["Date","Status"]).rename_axis(columns="State").stack().unstack(1)在此之前
Date Status TT AN AP
0 2021-01-01 Confirmed 5 44 17
1 2021-01-01 Recovered 44 5 48
2 2021-01-01 Deceased 27 3 24
3 2021-01-02 Confirmed 33 14 38
4 2021-01-02 Recovered 21 15 6
5 2021-01-02 Deceased 15 37 8
6 2021-01-03 Confirmed 15 20 36
7 2021-01-03 Recovered 18 19 44
8 2021-01-03 Deceased 37 22 1
9 2021-01-04 Confirmed 16 35 37
10 2021-01-04 Recovered 30 45 49
11 2021-01-04 Deceased 35 7 18之后
Status Confirmed Deceased Recovered
Date State
2021-01-01 TT 5 27 44
AN 44 3 5
AP 17 24 48
2021-01-02 TT 33 15 21
AN 14 37 15
AP 38 8 6
2021-01-03 TT 15 37 18
AN 20 22 19
AP 36 1 44
2021-01-04 TT 16 35 30
AN 35 7 45
AP 37 18 49页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/66302729
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