title: add column based on condition on several columns
body: <p>I have a large dataset of a survey. Now I want to add a column categorizing some of the participants based on their answers on some of the questions.</p>
  <p>I have the following dataframe:
  <em>(in reallity a lot wider than that, about 120 columns)</em></p>
  <pre><code>age item1 item2 item3 ... item9 question1 question2 ...
  18      0     0     4 ...     0         1         2 ...
  19      0     4     0 ...     0         5         6 ...
  20      4     4     0 ...     4         1         2 ...
  21      0     0     4 ...     0         3         4 ...
  </code></pre>
  <p>I have the following list of items I want to consider for my categorization: <em>(in reality a lot longer than just 3 items)</em></p>
  <pre><code>selector &lt;- c(&quot;item1&quot;, &quot;item2&quot;, &quot;item9&quot;)
  </code></pre>
  <p>Now I want to select every participant (row) that matches the criterion &quot;at least on item out of my list was rated higher than 3&quot; and add a tag to the row.
  I cannot use something like &quot;starts_with&quot; because I don't want all the items starting with &quot;item&quot; but only the ones in my list.</p>
  <p>Result should look like this:</p>
  <pre><code>age item1 item2 item3 ... item9 question1 question2 ... category
  18      0     0     4 ...     0         1         2 ... FALSE
  19      0     4     0 ...     0         5         6 ... TRUE
  20      4     4     0 ...     4         1         2 ... TRUE
  21      0     0     4 ...     0         3         4 ... FALSE
  </code></pre>
  <p>How do I achieve this without writing out a conditional statement for every single column I want to consider?</p>
  <p>Edit: In a first version of ths question I was told that <a href="https://stackoverflow.com/questions/32851588/getting-subset-of-of-data-based-on-multiple-column-values">this question</a> answers mine, which it does not. This is because I do explicitly not want to name all the columns in the condition but get them from a sigle place like a list. The answer in the afore mentioned question only works if you want to subset a dataset and if you do not have an extensive list of conditions to check. So what can I do?</p>