title: Accessing a column from a JSON table using R
body: <p>I have read a JSON data file named <code>df</code> using fromJSON(). It has a table:</p>
  <pre><code>$table$info 
  id  OrderNum Tags.store
  124 1        Great
  125 2        Book
  126 5        Nice
  125 &lt;NA&gt;     Cool
  128 1        &lt;NA&gt; 
  
  </code></pre>
  <p>I tried <code>df$$table$info$Tags.store</code> but nothing is returned. <code>id</code> and <code>OrderNum</code> works well. Are there any turnabouts?</p>