Mapping language families

Let’s return to our two examples of Nilo-Saharan language family trees. To examine differences in structure, we’ll need to first create these in NetworkX. For the Dimmendaal family tree, we’ll break with the tree structure slightly to show the interrelationships that exist for some of the child subfamilies. Let’s get started by creating and plotting the Greenberg tree with Script 11.1:

#load needed packages
import numpy as np
import networkx as nx
import matplotlib.pyplot as plt
#create the Greenberg Nilo-Saharan language family network
G = nx.Graph()
G.add_nodes_from([1, 11])
G.add_edges_from([(1,2),(1,3),(1,4),(1,5),(1,6),(1,7),(7,8),
    (7,9),(7,10),(7,11)])
#plot the Greenberg Nilo-Saharan language family  network
import matplotlib.pyplot as plt
G.nodes[1]['subfamily'] = 'Nilo_Saharan'
G.nodes[2]['subfamily'] = 'Koman'
G.nodes[3]['subfamily'...