水平树与graphviz_layout

Question

在python中,使用networkx.我可以绘制一个垂直树:

   g=nx.balanced_tree(2,4)
   pos = nx.graphviz_layout(g, prog='dot')
   nx.draw(g,pos,labels=b_all, node_size=500)
   plt.show()

相近

   [root]
     |
  |      |
 node   node

如何绘制水平树？

        -- node
[root] - 
        -- node

Answer 1

传递-Grankdir=LR点选项:

pos = nx.graphviz_layout(G, prog='dot', args="-Grankdir=LR")

http://www.graphviz.org/content/command-line-invocation

http://www.graphviz.org/content/attrs#drankdir