擅长:python、mysql、java
<p>以下是R中的解决方案:</p>
<pre><code>file1 <- "AGGGCUUAGCUGCUUGUGAGCA"
file2 <- "UUCACAGUGGCUAAGUUCCGC"
file3 <- "CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG"
# create a regular expression
pattern <- paste0(".*", file1, "(.*)", file2, ".*")
# extract the substring
sub(pattern, "\\1", file3)
# [1] "GGGUCCACACCAAGUCGUG"
</code></pre>