如果我有以下图形,并使用矢量设置节点的位置坐标:
library(igraph)
library(Cairo)
g9<- graph(c(0,1,0,2,0,3,1,4,1,2,3,4,3,5,4,5,5,2),n=6,dir=FALSE)
V(g9)$name<-c(1:6)
V(g9)$label<-V(g9)$name
coords <- c(0, 0, 1.00000000000000, 0,0.500000000000000, 0.866025403784439, 0.300000000000000, 0.200000000000000, 0.441421356237309, 0.341421356237310,0.248236190979496,0.393185165257814)
coords <- matrix(coords, 6,2,byrow=T)
plot(g9,layout=coords)
现在,如果添加以下代码,则必须再次设置坐标布局:
vc<-c(0,1,1,2,2,3,3,1)
gp<-graph(vc,dir=FALSE);
listSub<-graph.get.subisomorphisms.vf2(g9,gp)
m<-matrix(c(unlist(listSub)),length(listSub),length(unique(vc)),byrow=T)
md<-m[!duplicated(m[,1]),]
g<-delete.vertices(g9,c(m[1,2]))
dev.new()
coord <- c(0, 0, 1.00000000000000, 0,0.500000000000000, 0.866025403784439, 0.441421356237309, 0.341421356237310,0.248236190979496,0.393185165257814)
coord <- matrix(coord, 5,2,byrow=T)
plot(g,layout=coord)
如何将这些布局位置设置为默认值-以便可以在图形结构上进行修改而不会丢失每个名称的对应位置?
最佳答案
您可以保留初始的coord
矩阵
并且仅提取子图所需的行。
plot(g9, layout = coords[ V(g9)$name, ])
plot(g , layout = coords[ V(g)$name, ])