title: What is df.values[:,1:]?
body: <pre><code>from sklearn.preprocessing import StandardScaler
  X = df.values[:,1:] 
  X = np.nan_to_num(X)
  Clus_dataSet = StandardScaler().fit_transform(X)
  Clus_dataSet
  </code></pre>
  <p><strong>Does anyone understand what is the meaning of this context?</strong></p>
  <p><a href="https://i.stack.imgur.com/ymqFR.png" rel="nofollow noreferrer">Here is the screenshot!!</a></p>