R中的igraph：将相同颜色的节点彼此相邻排列

Question

我的例子：

library(igraph)
links <- cbind.data.frame(from = rep("A", 6),
                  to = LETTERS[1:6],
                  weight = rep((1:3), each =2))

nodes <- cbind.data.frame(id = LETTERS[1:6],
                           feature = rep((1:3), each =2))

net <- graph_from_data_frame(d = links, vertices = nodes, directed = T) 
V(net)$color <- V(net)$feature
plot(net, vertex.size=30, edge.arrow.size = 0)

结果图如下：

我想要的是将相同颜色的节点排列在一起，如下图所示。相同颜色的节点彼此相邻。

Answer 1

我找到了一种非常简单的方法。只需使用as_star布局

LO <- layout_(net, as_star())
plot(net, vertex.size = 30, edge.arrow.size = 0, layout = LO)