igraph R |如何为每个节点添加第二个内部圆？

Question

我想在当前顶点添加第二个内部圆。它应该与某个变量成比例。

这是一个例子：

我已经知道如何为主圆做到这一点，即顶点大小。

variable1 <- c(20,40,60) # this will define the size of the vertices
g1 <- graph(edges=c(1,2, 2,3, 3,1), n=3, directed=F)
V(g1)$size <- variable1 # this assigns the vertices size to the igraph object 'g1'
plot(g1)
variable2 <- c(10,20,30) # this would be needed for a second, internal circle, ideally in a different color

有什么想法吗？

Answer 1

你可以尝试

library(igraph)
variable1 <- c(20,40,60) # this will define the size of the vertices
variable2 <- c(10,20,30) # this would be needed for a second, internal circle, ideally in a different color
g1 <- graph(edges=c(1,2, 2,3, 3,1), n=3, directed=F)
V(g1)$size <- variable1 # this assigns the vertices size to the igraph object 'g1'
coords <- layout.auto(g1)
plot(g1, layout=coords, vertex.frame.color="orange", vertex.color=NA, vertex.label = NA)
plot(g1, layout=coords, vertex.size=variable2, add=T, vertex.color="lightgray")