title: Can K-means do dimensionality reduction？
body: <p>My question is if we have 10 columns continuous variable,
  can we do k-means to shrink 10 columns to 1 with corresponding cluster labels
  and then do decision tree or logistic regression?</p>
  
  <p>if a new data comes in, use k-mean result to determine its label and go to the machine learning model.</p>