擅长:python、mysql、java
<p>在baser中,我们可以使用<code>sub</code>和<code>mapply</code></p>
<pre><code>df$diff <- mapply(function(x, y) sub(x, "", y), df$column1, df$column2)
df
# index column1 column2 diff
#1 1 Admission Date Residence - Location Residence - Location
#2 2 Malnutrition Malnutrition-12 -12
#3 3 TB NAN NAN
#4 4 Anaemia <NA> <NA>
</code></pre>