ABSTRACT
The purpose of plotting is to convey phenomena to the viewer’s cortex, not to provide a place to look up observed numbers. The natural basis for separating ‘smooth’ from ‘rough’ is an ordering of environments — presumably based on the attribute in question, and, usually, at least all genotypes involved in a particular picture. Since smoothing depends on order, different orders will provide different splittings into smooth and rough. If the order represents, at least approximately, an aspect of environmental differences of major importance, then the smoothing will be more effective and the smooth will be more relevant. The smallest number of environments for which such a process is relatively likely to work, seems to fall somewhere between 25 and 50.
