title: Open cell range in read_excel R
body: <p>Is there a way to not specify a cell range in the <code>read_excel</code> function in R?</p>
  
  <p>So, for example, if the data entries start at cell C3 and end at cell D300, could I not be forced to specify D300, but instead tell R to read until there are no more cells with data entries in them?</p>
  
  <p>Something like:</p>
  
  <pre><code>A &lt;- read_excel("excell/book.xlsx", sheet="A", range="C3:")
  </code></pre>