我有一个熊猫df如下:
>>> df
sales net_pft sales_gr net_pft_gr
STK_ID RPT_Date
600809 20120331 22.1401 4.9253 0.1824 -0.0268
20120630 38.1565 7.8684 0.3181 0.1947
20120930 52.5098 12.4338 0.4735 0.7573
20121231 64.7876 13.2731 0.4435 0.7005
20130331 27.9517 7.5182 0.2625 0.5264
20130630 40.6460 9.8572 0.0652 0.2528
20130930 53.0501 11.8605 0.0103 -0.0461
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然后df[['sales','net_pft']].unstack('STK_ID').plot(kind='bar', use_index=True)创建条形图.
并df[['sales_gr','net_pft_gr']].plot(kind='line', use_index=True)创建折线图:
现在我想使用twinx()将它们放在两个y轴的图表中.
import matplotlib.pyplot as plt
fig = plt.figure()
ax = df[['sales','net_pft']].unstack('STK_ID').plot(kind='bar', use_index=True)
ax2 = ax.twinx()
ax2.plot(df[['sales_gr','net_pft_gr']].values, linestyle='-', marker='o', linewidth=2.0)
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结果是这样的:

我的问题是:
我试图绘制一个图表,其中第一列和第二列数据为条形,然后是第三列数据的行覆盖.
我尝试了以下代码,但这创建了2个单独的图表,但我希望这一切都在一个图表上.
left_2013 = pd.DataFrame({'month': ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec'],
'2013_val': [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9, 6]})
right_2014 = pd.DataFrame({'month': ['jan', 'feb'], '2014_val': [4, 5]})
right_2014_target = pd.DataFrame({'month': ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec'],
'2014_target_val': [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]})
df_13_14 = pd.merge(left_2013, right_2014, how='outer')
df_13_14_target = pd.merge(df_13_14, right_2014_target, how='outer')
df_13_14_target[['month','2013_val','2014_val','2014_target_val']].head(12)
plt.figure()
df_13_14_target[['month','2014_target_val']].plot(x='month',linestyle='-', marker='o') …Run Code Online (Sandbox Code Playgroud)