我有以下 Dataframe ：

Customer Complaint  \
date_index                                                               
2015-04-22 15:53:50                      Comcast Cable Internet Speeds   
2015-08-04 10:22:56       Payment disappear - service got disconnected   
2015-04-18 09:55:47                                  Speed and Service   
2015-07-05 11:59:35  Comcast Imposed a New Usage Cap of 300GB that ...   
2015-05-26 13:25:26         Comcast not working and no service to boot   

                         Date Date_month_year         Time  \
date_index                                                   
2015-04-22 15:53:50  22-04-15      2015-04-22   3:53:50 PM   
2015-08-04 10:22:56  04-08-15      2015-08-04  10:22:56 AM   
2015-04-18 09:55:47  18-04-15      2015-04-18   9:55:47 AM   
2015-07-05 11:59:35  05-07-15      2015-07-05  11:59:35 AM   
2015-05-26 13:25:26  26-05-15      2015-05-26   1:25:26 PM

我想将每个日期的投诉数量分组（类似于 df['Date_month_year'].value_counts() )并绘制一个时间序列图。如果我和你一起去 df['Date_month_year'].value_counts().plot(title='Complaints by Date', xlabel='Date', ylabel='Complaints') 或 df.groupby(pd.Grouper(freq='D')).size().plot(title='Complaints by date', xlabel='Month',ylabel='Complaints') 我得到以下输出，其中在x轴上跳过特定日期，只显示月份。如何解决这个问题？非常感谢。