title: PCA change colours of clusters
body: <p>I want to change the colours of my clusters but maintain the shape.  <code>habillage=iris$Species</code> changes both colour and shape, what can to change only colours? </p>
  
  <pre><code>library("devtools")
  install_github("kassambara/factoextra")
  library("factoextra")
  res.pca &lt;- prcomp(iris[, -5],  scale = TRUE)
  fviz_pca_ind(iris.pca,  geom="point",  pointsize = 1, habillage=iris$Species, addEllipses=TRUE, ellipse.level=0.95)
  </code></pre>