Created
June 22, 2018 07:29
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Generate graph the B(2, 3)
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import networkx as nx | |
import pylab as plt | |
import pygraphviz as pgv | |
from networkx.drawing.nx_agraph import graphviz_layout, to_agraph | |
def de_bruijn_graph(st, k): | |
edges = [] | |
nodes = set() | |
for i in range(len(st) - k + 1): | |
edges.append((st[i : i + k - 1], st[i + 1 : i + k])) | |
nodes.add(st[i : i + k - 1]) | |
nodes.add(st[i + 1 : i + k]) | |
return nodes, edges | |
def draw(nodes, edges, fname): | |
G = nx.DiGraph() | |
G.add_nodes_from(nodes) | |
G.add_edges_from(edges) | |
G.graph['graph'] = {'rankdir': 'TD'} | |
G.graph['node'] = {'shape': 'circle'} | |
G.graph['edges'] = {'arrowsize': '4.0'} | |
A = to_agraph(G) | |
A.layout('dot') | |
A.draw(fname) | |
def main(): | |
nodes1, edges1 = de_bruijn_graph('0001110100', 3) | |
nodes2, edges2 = de_bruijn_graph('0000111101100101000', 4) | |
draw(nodes1, edges1, 'deb_graph1.png') | |
draw(nodes2, edges2, 'deb_graph2.png') | |
if __name__ == '__main__': | |
main() |
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