title: Rapidminer generate new examples from splitted attributes
body: <p>I have some data where one Attribute contains information, that has to be seperated into new examples (rows).</p>
  
  <p>That Attribute is called: 'Group' and a value looks like: 'A+B+C'</p>
  
  <p>I managed to split that Attribute, now I got 3 Attributes:</p>
  
  <p>'Group_1': 'A', 'Group_2': 'B', 'Group_3': 'C'</p>
  
  <p>This group has another attribute, e.g. 'Value': '3'.
  Now I want my example set to contain examples with the attributes Group and Value, instead of having a merged example.</p>
  
  <p>My table looks like this:</p>
  
  <p><a href="https://i.stack.imgur.com/ZRv0N.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZRv0N.jpg" alt="Example Set"></a>.</p>
  
  <p>I can manually multiply my process and select a subset with each group, then name then to Group and merge them together, but this is a static solution and the number of Group_x is not fixed.</p>
  
  <p>Is there a way I can automate that process depending on the count of group_x attributes?  (Using a Macro-Operator I can only count all attributes)</p>
  
  <p>The ExampleSet should look like this:</p>
  
  <p><a href="https://i.stack.imgur.com/m37xI.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/m37xI.jpg" alt="enter image description here"></a></p>