title: Phylogenetic model using multiple entries for each species
body: <p>I am relatively new to phylogenetic regression models. In the past I used PGLS when I had only 1 entry for each species in my tree. Now I have a dataset with thousands of records for a total of 9 species and I would like to run a phylogenetic model. I  read the tutorial of the most common packages (e.g. caper) but I am unsure how to build the model. </p>
  
  <p>When I try to create the object for caper, i.e. using:</p>
  
  <pre><code>obj &lt;- comparative.data(phy = Tree, data = Data, names.col = species, vcv = TRUE, na.omit = FALSE, warn.dropped = TRUE)
  </code></pre>
  
  <p>I get the message:</p>
  
  <blockquote>
    <p>Error in <code>row.names&lt;-.data.frame</code>(<code>*tmp*</code>, value = value) : 
      duplicate 'row.names' are not allowed
    In addition: Warning message:
    non-unique values when setting 'row.names': ‘Species1’, ‘Species2’, ‘Species3’, ‘Species4’, ‘Species5’, ‘Species6’, ‘Species7’, ‘Species8’, ‘Species9’</p>
  </blockquote>
  
  <p>I understood that I may solve this by applying a MCMCglmm model but I am unfamiliar with Bayesian models. </p>
  
  <p>Thanks in advance for your help. </p>