擅长:python、mysql、java
<p>如果我理解正确,首先要合并:</p>
<pre><code> X = X.merge(dframe, how='left', left_on='Class', right_on='Pred_class')
</code></pre>
<p>然后,您只需按常规添加:</p>
<pre><code> X['Final_Q'] = X['Quantity'] + X['Delta']
</code></pre>
<p>这将为您带来:</p>
<pre><code> Class Quantity Delta Pred_class Final_Q
0 0 1 -0.046348 0 0.953652
1 0 5 -0.046348 0 4.953652
2 1 6 1.856508 1 7.856508
3 2 8 20.347518 2 28.347518
4 3 9 -7.138728 3 1.861272
5 4 0 6.642686 4 6.642686
</code></pre>