使用networkx导入图形的布局位置
我对 Networkx 很陌生。我正在尝试导入由 random_layout() 函数生成的布局位置。我不知道该怎么做。
生成布局位置的代码：
G = nx.random_geometric_graph(10, 0.5)
pos = nx.random_layout(G)
nx.set_node_attributes(G, 'pos', pos)
f = open("graphLayout.txt", 'wb')
f.write("%s" % pos)
f.close()
print pos
filename = "ipRandomGrid.txt"
fh = open(filename, 'wb')
nx.write_adjlist(G, fh)
#nx.write_graphml(G, sys.stdout)
nx.draw(G)
plt.show()
fh.close()
文件：ipRandomGrid.txt
# GMT Tue Dec 06 04:28:27 2011
# Random Geometric Graph
0 1 3 4 6 8 9
1 3 4 6 8 9
2 4 7
3 8 6
4 5 6 7 8
5 8 9 6 7
6 7 8 9
7 9
8 9
9
我将节点 adjlist 和布局存储在文件中。现在我想从其他文件生成具有相同布局和 adjlist 的图表。我尝试用下面的代码生成它。谁能帮我弄清楚这里出了什么问题。
导入时的代码： 伪代码
G = nx.Graph()
G = nx.read_adjlist("ipRandomGrid.txt")
# load POS value from file
nx.draw(G)
nx.draw_networkx_nodes(G, pos, nodelist=['1','2'], node_color='b')
plt.show()
I am very new to Networkx. I am trying to import layout position generated by random_layout() function. I dont know how to do proceed with it.
Code to generate layout position:
G = nx.random_geometric_graph(10, 0.5)
pos = nx.random_layout(G)
nx.set_node_attributes(G, 'pos', pos)
f = open("graphLayout.txt", 'wb')
f.write("%s" % pos)
f.close()
print pos
filename = "ipRandomGrid.txt"
fh = open(filename, 'wb')
nx.write_adjlist(G, fh)
#nx.write_graphml(G, sys.stdout)
nx.draw(G)
plt.show()
fh.close()
File: ipRandomGrid.txt
# GMT Tue Dec 06 04:28:27 2011
# Random Geometric Graph
0 1 3 4 6 8 9
1 3 4 6 8 9
2 4 7
3 8 6
4 5 6 7 8
5 8 9 6 7
6 7 8 9
7 9
8 9
9
I am storing both node adjlist and the layout in files. Now I want to generate the graph with the same layout and adjlist from other file. I tried to generate it with the below code. Can anyone help me to figure out what is wrong over here.
Code while importing:
Pseudo Code
G = nx.Graph()
G = nx.read_adjlist("ipRandomGrid.txt")
# load POS value from file
nx.draw(G)
nx.draw_networkx_nodes(G, pos, nodelist=['1','2'], node_color='b')
plt.show()
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nx.random_layout 函数返回将节点映射到位置的字典。由于 pos 是一个 Python 对象，您不希望只将其打印字符串版本存储到文件中，就像在 f.write("%s" % pos) 中所做的那样。这会为您提供一个包含字典的文件，但读回它并不那么容易。
相反，使用专为该任务设计的标准库模块之一序列化
pos，例如json或pickle。它们的接口基本相同，因此我将仅展示如何使用pickle来实现。存储为：重新加载为：
The
nx.random_layoutfunction returns a dictionary mapping nodes to positions. Asposis a Python object, you don't want to just store the printed string version of it to a file, as you did inf.write("%s" % pos). This gives you a file containing your dictionary, but reading it back in isn't as easy.Instead, serialize
posusing one of the standard library modules designed for that task, for example,jsonorpickle. Their interfaces are basically the same, so I'll just show how to do it withpickle. Storing is:Reloading is: