get_graph_f4_sign: Extracts the sign for the f_4 statistics predicted by the graph.
Description
Extracts the sign for the $f_4$ statistics predicted by the graph.
Usage
get_graph_f4_sign(graph, W, X, Y, Z)
Arguments
graph
The admixture graph.
W
First population/sample.
X
Second population/sample.
Y
Third population/sample.
Z
Fourth population/sample.
Value
The sign of the $f_4$ specified by the graph (or NA when it
cannot be determined without knowing the graph parameters).