David Zelený

en:mix:logo

# Logo (of heart) on the top of this website

This is just simple horseshoe artefact, which arises from linear ordination analysis (PCA in this case) when applied on heterogeneous data. I used simulated community dataset, structured by one artificial “environmental” gradient, and applied principal component analysis (PCA) on it. The R code which I used to generate this figure is below:

library (vegan)
#dev.off ()
(you may remove # to get *.png file with the exact size of logo and without white background)