n><span class='op'>(</span><span class='va'>pbmc</span><span class='op'>)</span>
<span class='va'>edges</span> <span class='op'>=</span> <span class='va'>pbmc</span><span class='op'>@</span><span class='va'>graphs</span><span class='op'>[[</span><span class='fu'><a href='https://rdrr.io/r/base/which.html'>which</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/grep.html'>grepl</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/paste.html'>pa