title: How to convert all values in a column to floating point values in R?
body: <p>I have a dataframe like this:</p>
  
  <pre><code>ID     A     B     
   0    0052  225  
   1   00558  305  
   2    0855  250  
  ...              ...
  </code></pre>
  
  <p>All I want is to change the values of column 'A' in a way, that it looks like this, with only the last two digits as floating point values and the third last in front of the decimal point: </p>
  
  <pre><code>ID    A     B    
   0   0.52  225  
   1   5.58  305  
   2   8.55  250  
  ...             ...
  </code></pre>
  
  <p><br/> <br/></p>
  
  <hr>
  
  <p>I am new to R, if you know some good basic guidelines or books for scientific plotting, let me know. :-)</p>
  
  <p>Thanks for your help.</p>