如何使用matplotlib或graphviz在networkx中绘制多图 [英] how to draw multigraph in networkx using matplotlib or graphviz

问题描述

当我将多图numpy邻接矩阵传递给networkx时(使用from_numpy_matrix函数) 然后尝试使用matplotlib绘制图形，它将忽略多个边.

我怎样才能使其绘制多个边缘?

解决方案

Graphviz很好地绘制了平行边缘.您可以通过编写点文件，然后使用Graphviz处理(例如下面的neato布局)，将其用于NetworkX.除了NetworkX，您还需要pydot或pygraphviz

In [1]: import networkx as nx

In [2]: G=nx.MultiGraph()

In [3]: G.add_edge(1,2)

In [4]: G.add_edge(1,2)

In [5]: nx.write_dot(G,'multi.dot')

In [6]: !neato -T png multi.dot > multi.png

在NetworkX 1.11及更高版本上，nx.write_dot不能按照networkx github上的问题.解决方法是使用调用write_dot

from networkx.drawing.nx_pydot import write_dot

或

from networkx.drawing.nx_agraph import write_dot

when I pass multigraph numpy adjacency matrix to networkx (using from_numpy_matrix function) and then try to draw the graph using matplotlib, it ignores the multiple edges.

how can I make it draw multiple edges as well ?

解决方案

Graphviz does a good job drawing parallel edges. You can use that with NetworkX by writing a dot file and then processing with Graphviz (e.g. neato layout below). You'll need pydot or pygraphviz in addition to NetworkX

In [1]: import networkx as nx

In [2]: G=nx.MultiGraph()

In [3]: G.add_edge(1,2)

In [4]: G.add_edge(1,2)

In [5]: nx.write_dot(G,'multi.dot')

In [6]: !neato -T png multi.dot > multi.png

On NetworkX 1.11 and newer, nx.write_dot doesn't work as per issue on networkx github. The workaround is to call write_dot using

from networkx.drawing.nx_pydot import write_dot

or

from networkx.drawing.nx_agraph import write_dot

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