title: How to select the nth position from a string vector?
body: <p>How does one find, let's say, the 2nd position from a string vector?</p>
  
  <p>Here's a string vector example:</p>
  
  <pre><code>1 2 3 4 Hi
  7 8 9 0 Bye
  2 2 5 6 World
  </code></pre>
  
  <p>If I use <code>example.at(2)</code>, it gives me the whole row <code>2 2 5 6 World</code>. </p>
  
  <p>I just want to get <code>2</code> from the 1st row instead of getting the whole line of <code>2 2 5 6 World</code>. How do I do that?</p>