title: How to Iterate over DataFrame Column and Update Column Values
body: <p>I'm trying to iterate though the abc column and update its' value, but I keep getting errors. Any help would be appreciated.</p>
  
  <pre><code>somedata.csv:
                      ABC
  0               0.00094
  1               0.00094
  2               0.00094
  3               0.00094
  ...
  4999            0.00094
  
  
  data = pd.read_csv("somedata.csv")
  abc = pd.DataFrame(data, columns = ['ABC'])
  
  for column in abc:
      value = (abc - min(abc)) / (max(abc) - min(abc))
      abc = value
  </code></pre>
  
  <p>Error: numpy.core._exceptions.UFuncTypeError: ufunc 'subtract' did not contain a loop with signature matching types (dtype(' dtype('<br><br>
  line 72, in  <br>
      value = (abc - min(abc)) / (max(abc) - min(abc))</p>