title: Excel - From a matrix to a list
body: <p>I want to transform a matrix into a single column list.</p>
  
  <p>Lets say I have this matrix:</p>
  
  <pre><code>qq|w|x|y|z
  a |1| |2|
  b | | |2|3
  c |1|3|2|
  </code></pre>
  
  <p>and I want to make a list from it, like this:</p>
  
  <pre><code>a,1,2
  b,2,3
  c,1,3,2
  </code></pre>
  
  <p>edit: I'm using Excel 15.19 (for mac)</p>