title: R k-means algorithm custom centers
body: <p>I have a 2D dataset imported in R - <code>(x,y)</code> coordinates. I want to perform k-means clustering on this dataset, but I would like to set concrete coordinates to be initial centers. For example, I would like to start with 5 centers with their values to be <code>(5, 10), (3, 8), (46, 22), (87, 66), (39, 41)</code> .</p>
  
  <p>I saw a centers parameter in kmeans function, but I do not understand how to set my values to be centeres. </p>
  
  <pre><code>kmeans(data, centers = ...) # what to set here?
  </code></pre>