有没有办法 link 一个图到另一个图（igraph）的任何特定顶点？

Question

我想通过将一个图的节点连接到另一个来连接两个独立的图

比如我有两个图G和H

G = 1-3,1-5,5-9,5-21,21-22 H = 0-31,31-32,31-34,31-35,35-88

我想 link 通过将图 H 的节点 0 连接到图 G 的节点 5 link 图 H 和图 G

1-3,1-5,5-9,5-21,21-22,5-0, 0-31,31-32,31-34,31-35,35-88

Answer 1

请使用库 igraph.

的 edge() 函数从您的数据中找到以下一种可能的解决方案

Reprex

第 1 步：构建和可视化图表 G 和 H

library(igraph)

# Building the graph 'G'    
G <- graph(edges = c("1","3", "1","5", "5","9", "5","21", "21","22"), directed = FALSE)

#Building the graph 'H' 
H <- graph(edges = c("0","31", "31","32", "31","34", "31","35", "35","88"), directed = FALSE) 

# Visualizing the graph 'G'     
plot(G)

# Visualizing the graph 'H'
plot(H)

第 2 步：将两个图 G 和 H 与边 0-5

# Building the graph 'Results'
Results <- G + H + edge("0", "5")

# Visualizing the graph 'Results'
plot(Results)

^{由 reprex package (v2.0.1)}

创建于 2022-01-01

Answer 2

你可以试试disjoint_union + add_edges

> add_edges(disjoint_union(G, H), c("0", "5"))
IGRAPH 6cbfa1f UN-- 12 11 -- 
+ attr: name (v/c)
+ edges from 6cbfa1f (vertex names):
 [1] 1 --3  1 --5  5 --9  5 --21 21--22 0 --31 31--32 31--34 31--35 35--88
[11] 5 --0

有没有办法 link 一个图到另一个图（igraph）的任何特定顶点？

Is there any way to link a graph to any particular vertex of another graph (igraph)?

r

igraph