matsen/pplacer — Issue #199: Add quadratic entropy
Author: cmccoy
Created: 2011-12-23 18:04:42+00:00
State: open

`guppy pentropy` should be renamed `guppy entropy`, which two entropy measures:

* phylogenetic entropy (see #189)
* quadratic entropy, described in a phylogenetic context in this [paper](http://dx.doi.org/10.3354/meps129301).

The original formula is for quadratic entropy is:

Q = \sum_{i