title: How to plot sites in different colours in a NMDS plot in R (vegan package)?
body: <p>I have data from grassland (sites 1-14) and quarry (sites 15-28) sites and want them to have different colouring in my NMDS plot that I created with the vegan package, e. g. site numbers 1-14 in red and 15-28 in blue.</p>
  
  <p>I'm new to R and not familiar with editing of graphics.</p>
  
  <pre><code>vare.mds &lt;- metaMDS(species, trace=FALSE)
  plot(vare.mds, type = "n")
  text(vare.mds, display = "sites")
  </code></pre>