title: Normalization of only one column in data frame
body: <p>I have tried to find this solution but everywhere solution is given for normalization of whole dataset.</p>
  
  <p>I have a data frame</p>
  
  <pre><code>df
  M   T   N    T
  123 35  453  34
  169 119 135  239
  728 435 613  787
  115 748 5459 13277
  762 382 823  919
  986 963 883  348
  591 892 375  818
  278 21  777  455
  </code></pre>
  
  <p>I want to apply normalization to only one column i.e. "N"</p>
  
  <p>Normalization formula = (x-min)/(max-min)</p>
  
  <p>The new datafarme should be like:</p>
  
  <pre><code>    nm
   M  T     N      T
  123 35  0.0596  34
  169 119 0.0000  239
  728 435 0.0897  787
  115 748 1.0000  13277
  762 382 0.1291  919
  986 963 0.1404  348
  591 892 0.0450  818
  278 21  0.1205  455
  </code></pre>
  
  <p>Kindly provide the solution.</p>
  
  <p>Thanks!!</p>