title: Is this the best way to normalise data?
body: <p>I'm wondering if the method below is the best/most efficient way to normalise data in Python. I've seen other methods using scipy but this way seems to work well too. Really just wondering if there's a reason you'd use another method.</p>
  
  <pre><code>purch_norm = (dataload.purchase - dataload.purchase.mean()) / (dataload.purchase.max() - dataload.purchase.min())
  </code></pre>