title: Remove extra row in printing to file
body: <p>I'm attempting to print to file the output of a <code>str_split</code> operation as follows:</p>
  <pre><code>s &lt;- t(unlist(str_split(&quot;foo_bar_0.5&quot;, &quot;_&quot;), use.names = FALSE))
  write.csv(s, &quot;test.csv&quot;, quote = FALSE, row.names = FALSE, col.names = FALSE)
  </code></pre>
  <p>With the <code>row.names = FALSE</code> argument, I was able to remove the row names. However, this code still writes an extra line with the column names to the file as follows:</p>
  <pre><code>V1,V2,V3
  foo,bar,0.5
  </code></pre>
  <p>With the following warning:</p>
  <pre><code>Warning message:
  In write.csv(s, &quot;test.csv&quot;, quote = FALSE,  :
    attempt to set 'col.names' ignored
  </code></pre>
  <p>I want only the second line. Any ideas what I am doing wrong?</p>