title: R Treemap - how to add multiple labels
body: <p>I'm trying to create a treemap using R package treemap similar to the one in a sample from the package.</p>
  
  <pre><code>library(treemap)
  data(GNI2010)
  treemap(GNI2010,
      index=c("iso3"),
      vSize="population",
      vColor="GNI",
      type="value")
  </code></pre>
  
  <p>Is there any way to add extra labels from columns to display "CHN, 1,35 bln, 20% " </p>