The $f$ statistics -- $f_2$, $f_3$, and $f_4$ -- extract
information about correlations between gene frequencies in different
populations (or single diploid genome samples), which can be informative
about patterns of gene flow between these populations in form of admixture
events. If a graph is constructed as a hypothesis for the relationship
between the populations, equations for the expected values of the $f$
statistics can be extracted, as functions of edge lengths -- representing
genetic drift -- and admixture proportions.This package provides functions for extracting these equations and for
fitting them against computed $f$ statistics. It does not currently
provide functions for computing the $f$ statistics -- for that we refer
to the ADMIXTOOLS software
package.