title: Get indexes of a vector of numbers in another vector
body: <p>Let's suppose we have the following vector:</p>
  <pre><code>v &lt;- c(2,2,3,5,8,0,32,1,3,12,5,2,3,5,8,33,1)
  </code></pre>
  <p>Given a sequence of numbers, for instance <code>c(2,3,5,8)</code>, I am trying to find what the position of this sequence of numbers is in the vector <code>v</code>. The result I expect is something like:</p>
  <pre><code>FALSE TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE FALSE FALSE TRUE TRUE TRUE TRUE FALSE FALSE
  </code></pre>
  <p>I am trying to use <code>which(v == c(2,3,5,8))</code>, but it doesn't give me what I am looking for.</p>