title: How to extract multiples of a number from a vector
body: <p>I have a vector let's say</p>
  <p><code>x &lt;- 1:1000</code></p>
  <p>and I want to extract the multiples of 8 from it.</p>
  <p>What should I do?
  (I don't want to do <code>x[-c(8,16,24,.....)]</code> )</p>
  <p>The goal is to remove the multiples of 8 from the <code>x</code> vector.</p>