title: Create dummy-column based on another columns
body: <p>Let's say I have this dataset</p>
  
  <pre><code>&gt; example &lt;- data.frame(a = 1:10, b = 10:1, c = 1:5 )
  </code></pre>
  
  <p>I want to create a new variable <code>d</code>. I want in <code>d</code> the value 1 when at least in of the variables <code>a b c</code> the value 1 2 or 3 is present.
  <code>d</code> should look like this:</p>
  
  <pre><code>d &lt;- c(1, 1, 1, 0, 0, 1, 1, 1, 1, 1)
  </code></pre>
  
  <p>Thanks in advance. </p>