title: Splitting coloumn with differing syntax in R
body: <p>I am having some trouble cleaning up my data. It consists of a list of sold houses. It is made up of the sell price, no. of rooms, m2 and the address.
  As seen below the address is in one string. </p>
  
  <pre><code>Head(DF, 3)
  
  Address                            Price        m2        Rooms   
  Petersvej   1772900  Hoersholm     10.000       210       5        
  Annasvej    2B2900   Hoersholm     15.000       230       4        
  Krænsvej    125800   Lyngby C      10.000       210       5               
  A Mivs Alle 119800   Hjoerring      1.300        70       3        
  </code></pre>
  
  <p>The syntax for the address coloumn is: road name, road no., followed by a 4 digit postalcode and the city name(sometimes two words).</p>
  
  <p>Also need to extract the postalcode.. been looking at 'stringi' package haven't been able to find any examples..</p>
  
  <p>any pointers are very much appreciated</p>