擅长:python、mysql、java
<p>使用</p>
<pre><code>df.melt('age').set_index(['variable','value']).mean(level=[0,1]).unstack().plot(kind='bar')
</code></pre>
<p><a href="https://i.stack.imgur.com/0AXsg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0AXsg.png" alt="enter image description here"/></a></p>