pandas将数据帧绘制为多个条形图

Question

这是我的pandas数据帧’df’：

          ab             channel   booked
0    control             book_it     466
1    control          contact_me     536
2    control             instant     17
3  treatment             book_it     494
4  treatment          contact_me     56
5  treatment             instant     22

I want to plot 3 groups of bar chart (according to channel):

for each channel: plot control booked value vs treatment booked value.

hence i should get 6 bar charts, in 3 groups where each group has control and
treatment booked values.

SO far i was only able to plot booked but not grouped by ab:

ax = df_conv['booked'].plot(kind='bar',figsize=(15,10), fontsize=12)
ax.set_xlabel('dim_contact_channel',fontsize=12)
ax.set_ylabel('channel',fontsize=12)
plt.show()

Answer 1

透视数据帧，使控制值和处理值位于单独的列中。

df.pivot(index='channel', columns='ab', values='booked').plot(kind='bar')