擅长:python、mysql、java
<p>假设您有一个名为df的数据帧</p>
<pre><code>df = pd.DataFrame({'Confirmed': [100, 200, 300],
'Death': [10, 40, 90],
'Recovered': [45, 60, 50]})
# this code will add the columns 'Death Rate' and 'Recovery Rate'
df['Death Rate'] = df['Death'] / df['Confirmed'] * 100
df['Recovery Rate'] = df['Recovered'] / df['Confirmed'] * 100
</code></pre>