title: Correlation clustering in R
body: <p>I'd like to use <code>correlation clustering</code> and I figure <code>R</code> is a good place to start.</p>
  
  <p>I can present the data to <code>R</code> as a set of large, sparse vectors or as a table with a pre-computed dissimilarity matrix.</p>
  
  <p>My questions are:</p>
  
  <ul>
  <li>are there existing <code>R</code> functions to turn this into a <code>hierarchical cluster</code> with <code>agnes</code> that uses <code>correlation clustering</code>?</li>
  <li>will I have to implement the (admittedly simple) <code>correlation clustering</code>function by hand, if so how do I make it play well with <code>agnes</code>?</li>
  </ul>