The agreement matrix for Nsamples is an N× Nmatrix whose entries are the fraction of cases across replicates for which two samples fall into the same cluster

<p><b>Copyright information:</b></p><p>Taken from "Portraits of breast cancer progression"</p><p>http://www.biomedcentral.com/1471-2105/8/291</p><p>BMC Bioinformatics 2007;8():291-291.</p><p>Published online 6 Aug 2007</p><p>PMCID:PMC1978212.</p><p></p> Red/green represent high/low fractional values across clustering methods and data perturbation replicates. The normals and the LG1 and LG2 are clearly well separated while the HG1, HG2, HG3 and HG4 separation is weaker. We find that the optimum number of clusters using gap-statistics oscillates between 6 and 7 with the HG3 and HG4 clusters merging at -6