擅长:python、mysql、java
<p>你是说:</p>
<pre><code>df_s1.loc[(df_s1.metadata == "congruent_1") | (df_s1.metadata == "incongruent_1"), "reaction"].mean()
</code></pre>
<p>或使用<code>isin</code>更简单:</p>
<pre><code>df_s1.loc[df_s1.metadata.isin(["congruent_1", "incongruent_1"]), "reaction"].mean()
</code></pre>
<p>输出:</p>
<pre><code>24500.0
</code></pre>