title: PCoA (Principal *Coordinate* Analysis) in Accord.net
body: <p>I've been trying to use PCA (Principal Component Analysis) in Accord.net but am not getting the correct results for PCoA. 
  Is there a way to achieve this without writing the algo myself?</p>
  
  <pre><code>        var pca = new PrincipalComponentAnalysis()
          {
              Method = PrincipalComponentMethod.Standardize,
              Whiten = true
          };
          MultivariateLinearRegression transform = pca.Learn(distances);
          pca.NumberOfOutputs = 2;
          double[][] output = pca.Transform(distances);
  </code></pre>
  
  <p>note that the "distances" matrix is a NxN 1-correlation matrix of N time-series I get as an input.</p>