title: How to perform multiple left joins using dplyr in R
body: <p>How do I join multiple dataframes in R using <code>dplyr</code> ?</p>
  
  <pre><code>new &lt;- left_join(x,y, by = "Flag")
  </code></pre>
  
  <p>this is the code I am using to left join x and y
  the code doesn't work for multiple joins</p>
  
  <pre><code>new &lt;- left_join(x,y,z by = "Flag")
  </code></pre>