title: Looping through number list in R
body: <p>I'm trying to loop through a list of numbers and concatenate them at the end of a variable.</p>
  
  <pre><code>for(i in c(3,6,9)) {
      x3=...
      x6=...
      x9=...  }
  </code></pre>
  
  <p>Is there a way to macro numbers using R such as something like x`i'?</p>