title: When to use k means clustering algorithm?
body: <p>Can I use k-means algorithm for a single attribute?</p>
  
  <p>Is there any relationship between the attributes and the number of clusters?</p>
  
  <p>I have one attribute's performance, and I want to classify the data into 3 clusters: poor, medium, and good.</p>
  
  <p>Is it possible to create 3 clusters with one attribute?</p>