title: Get an uniform distributed sample but keep the order
body: <p>How could i get a sample of a values of a vector but keep the order without compairing the values themself against each other?</p>
  <p>for example:</p>
  <pre><code>V1 contains values (1,2,3,4,5,6,7,8,9,10,11,12,13,14)
  </code></pre>
  <p>I woule like to get a sample</p>
  <pre><code>sample &lt;- (2,7,10,14)
  </code></pre>
  <p>As you can see the values are still on order but randomly selected.</p>
  <p>But if i use a function sample or rdunif in R I get random orderd selection:</p>
  <pre><code>ie. (7,10,2,14)
  </code></pre>
  <p>Thank you!</p>