从分组的pandas数据框中绘制堆积图

Question

我有一个数据框，如下所示。首先，我想要计算每个日期的每个状态。 例如2017-11-02中“完成”的数量是2.我想要一个这样的叠加图。

                   status              start_time                end_time  \
0             COMPLETED 2017-11-01 19:58:54.726 2017-11-01 20:01:05.414   
1             COMPLETED 2017-11-02 19:43:04.000 2017-11-02 19:47:54.877   
2     ABANDONED_BY_USER 2017-11-03 23:36:19.059 2017-11-03 23:36:41.045   
3  ABANDONED_BY_TIMEOUT 2017-10-31 17:02:38.689 2017-10-31 17:12:38.844   
4             COMPLETED 2017-11-02 19:35:33.192 2017-11-02 19:42:51.074   

这是数据帧的csv：

status,start_time,end_time
COMPLETED,2017-11-01 19:58:54.726,2017-11-01 20:01:05.414
COMPLETED,2017-11-02 19:43:04.000,2017-11-02 19:47:54.877
ABANDONED_BY_USER,2017-11-03 23:36:19.059,2017-11-03 23:36:41.045
ABANDONED_BY_TIMEOUT,2017-10-31 17:02:38.689,2017-10-31 17:12:38.844
COMPLETED,2017-11-02 19:35:33.192,2017-11-02 19:42:51.074
ABANDONED_BY_TIMEOUT,2017-11-02 19:35:33.192,2017-11-02 19:42:51.074

为达到这个：

df_['status'].astype('category')
df_ = df_.set_index('start_time')
grouped = df_.groupby('status')
color = {'COMPLETED':'green','ABANDONED_BY_TIMEOUT':'blue',"MISSED":'red',"ABANDONED_BY_USER":'yellow'}

for key_, group in grouped:
   print(key_)
   df_ = group.groupby(lambda x: x.date).count()
   print(df_)
   df_['status'].plot(label=key_,kind='bar',stacked=True,\
   color=color[key_],rot=90)
plt.show()

以下输出是：

ABANDONED_BY_TIMEOUT
            status  end_time  
2017-10-31       1         1       
ABANDONED_BY_USER
            status  end_time  
2017-11-03       1         1            
COMPLETED
            status  end_time  
2017-11-01       1         1             
2017-11-02       2         2 

我们可以看到这里的问题仅考虑过去两个日期'2017-11-01'和'2017-11-02'而不是所有类别中的所有日期。 我怎样才能解决这个问题呢？我欢迎采用全新的堆积方法。谢谢。

Answer 1

import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns

df_ = pd.read_csv('sam.csv')
df_['date'] = pd.to_datetime(df_['start_time']).dt.date
df_ = df_.set_index('start_time')


grouped = pd.DataFrame(df_.groupby(['date', 'status']).size().reset_index(name="count")).pivot(columns='status', index='date', values='count')
print(grouped)
sns.set()

grouped.plot(kind='bar', stacked=True)

# g = grouped.plot(x='date', kind='bar', stacked=True)
plt.show()

输出：

Answer 2

尝试使用pandas.crosstab重构df_ ：

color = ['blue', 'yellow', 'green', 'red']
df_xtab = pd.crosstab(df_.start_time.dt.date, df_.status)

此DataFrame将如下所示：

status      ABANDONED_BY_TIMEOUT  ABANDONED_BY_USER  COMPLETED
start_time                                                    
2017-10-31                     1                  0          0
2017-11-01                     0                  0          1
2017-11-02                     1                  0          2
2017-11-03                     0                  1          0

并且将更容易绘图。

df_xtab.plot(kind='bar',stacked=True, color=color, rot=90)

Answer 3

使用seaborn library barplot及其色调

码：

import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns

df_ = pd.read_csv('sam.csv')
df_['date'] = pd.to_datetime(df_['start_time']).dt.date
df_ = df_.set_index('start_time')

print(df_)

grouped = pd.DataFrame(df_.groupby(['date', 'status']).size().reset_index(name="count"))
print(grouped)

g = sns.barplot(x='date', y='count', hue='status', data=grouped)
plt.show()

输出：

---

数据：

status,start_time,end_time
COMPLETED,2017-11-01 19:58:54.726,2017-11-01 20:01:05.414
COMPLETED,2017-11-02 19:43:04.000,2017-11-02 19:47:54.877
ABANDONED_BY_USER,2017-11-03 23:36:19.059,2017-11-03 23:36:41.045
ABANDONED_BY_TIMEOUT,2017-10-31 17:02:38.689,2017-10-31 17:12:38.844
COMPLETED,2017-11-02 19:35:33.192,2017-11-02 19:42:51.074
ABANDONED_BY_TIMEOUT,2017-11-02 19:35:33.192,2017-11-02 19:42:51.074