title: subset a data frame by row names of different rows
body: <p>I need to subset lines of data frame according their name. I have tried the following code but it is not working.</p>
  
  <pre><code>Name  plot  
  12     25
  22     23 
  14     12 
  16     22
  23     54
  
  DF.new &lt;- subset(DF, rownames== c("12" , "16"))
  </code></pre>