This is what happens when you use plot(y~x) and, due to low caffeine levels, omit the ~x. Surprising, inscrutable, and strangely beautiful— in a word, aRt.

Messed up optimization procedure of a dimensionality reduction technique (a standalone tool, not in R). I have no idea, where does the symmetry come from;)

No mistake here, just unexpectedly beautiful. This is the modeled %cover of desert annuals as a function of distance from creosotebush, grouped by shrubs in our plot, if it had rained the normal amount.