title: List to integer or double in R
body: <p>I have a list of about 1000 single integers.  I need to be able to do some mathematical computations, but they're stuck in list or character form.  How can I switch them so they're usable?</p>
  
  <p>sample data:</p>
  
  <pre><code>&gt; y [[1]] 
    [1] "7" "3" "1" "6" "7" "1" "7" "6" "5" "3" "1" "3" "3" "0" "6" "2" "4" "9" 
    [19] "1" "9" "2" "2" "5" "1" "1" "9" "6" "7" "4" "4" "2" "6" "5" "7" "4" "7"     
    [37] "4" "2" "3" "5" "5" "3" "4" "9" "1" "9" "4" "9" "3" "4" "9" "6" "9" "8" 
    [55] "3" "5" "2" "0" "3" "1" "2" "7" "7" "4" "5" "0" "6" "3" "2" "6" "2" "3" 
    [73] "9" "5" "7" "8" "3" "1" "8" "0" "1" "6" "9" "8" "4" "8" "0" "1" "8" "6" ...
  </code></pre>
  
  <p>Just the first couple of lines.</p>