[英]Add edges using networkx
是否有任何簡單的方法可以在networkx中將大量邊緣添加在一起
我想從列表中添加邊。
假設通過“將大量邊加在一起”,您的意思是從help(networkx.Graph)
“將它們添加到圖形中”:
| **Edges:**
|
| G can also be grown by adding edges.
|
| Add one edge,
|
| >>> G.add_edge(1, 2)
|
| a list of edges,
|
| >>> G.add_edges_from([(1,2),(1,3)])
所以:
>>> import networkx as nx
>>> g = nx.Graph()
>>> g.add_edges_from([(0,4),(1,2),(2,3)])
>>> g
<networkx.classes.graph.Graph object at 0x1004b58d0>
>>> g.edges()
[(0, 4), (1, 2), (2, 3)]
我絕對建議養成閱讀交互式文檔的習慣。 我正在使用IPython
,因此,為了快速瀏覽可用方法,我要做的就是繪制圖形g
,然后鍵入g.[TAB]
。 這顯示了一個列表, g.add_edges_from
是#3。
OTOH,如果您只是想將兩個邊緣列表加在一起,也可以這樣做:
>>> g0.edges() + g1.edges()
[(1, 2), (2, 3), (3, 4), (1, 2), (2, 3), (3, 4), (5, 6)]
>>> set(g0.edges() + g1.edges())
set([(1, 2), (3, 4), (5, 6), (2, 3)])
圖形數據通常存儲在文件中,這使得使用Pandas數據框易於讀取。 例如,考慮為七年級學生網絡構建圖。 我們可以如下初始化圖形:
import pandas as pd
import networkx as nx
#read the edge list
edges = pd.read_csv('./data/moreno_seventh/out.moreno_seventh_seventh', skiprows=2, sep = " ", header=None)
edges.columns = ['student1', 'student2', 'count']
#read node metadata
meta =pd.read_csv('./data/moreno_seventh/ent.moreno_seventh_seventh.student.gender', header=None)
meta.index += 1
meta.columns = ['gender']
#construct the graph
G = nx.DiGraph()
for row in edges.iterrows():
G.add_edge(row[1]['student1'], row[1]['student2'], count=row[1]['count'])
#add meta data
for i in G.nodes():
G.node[i]['gender'] = meta.ix[i]['gender']
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.