title: Customization of pointshape within function fviz_pca from FactoExtra package
body: <p>I have been struggling to make a change on the default point shape that comes in the output plot within the function <code>fviz_pca</code> from the R package <code>FactoExtra</code>. </p>
  
  <p>The plot appears with a certain order* of point shapes  which I want to customize.</p>
  
  <p>*The corresponding shapes are respectively 16,17,15,12,0,8</p>
  
  <pre><code>    fviz_pca_biplot(PCA, axes = c(1, 2), 
              label="var", col.var = "black", #setas
              geom = "point", pointsize = 2, col.ind=PCADF$groups, 
              addEllipses = TRUE, ellipse.level = 0.95,
              ellipse.type ="confidence", palette = "aaas") + theme_minimal()
  </code></pre>
  
  <p>I tried add to the function:</p>
  
  <pre><code>  geom_point(aes(shape = c(19,20,21,22,23,24)))
  </code></pre>
  
  <p>and it returned me a error message: </p>
  
  <blockquote>
    <p>Error in geom[1] : object of type 'environment' is not subsettable</p>
  </blockquote>
  
  <p>Any advice to manage and customize the pointshapes within the function fviz_pca?</p>