igraph R中的树形图格式

Question

我有网络数据的数据如下:

library(igraph)

dnode<-c("a","b","c","d","e","f","g","h","i","j","k")

dedge<-data.frame("From"=c("a","b","c","d","e","f","f","f","f","f"), "To"=c("f","f","f","f","f","g","h","i","j","k"))

当我用R绘制它时，我写的代码如下:

net <- graph_from_data_frame(d=dedge, vertices=dnode, directed=T)

l<- layout_as_tree

plot(net, vertex.shape="square", layout=l, edge.arrow.mode=2, edge.arrow.width=2, edge.arrow.size=0.1)

我得到这样的输出：

我想要这样的输出：

Answer 1

尝试使用杉山布局。语法与其他布局略有不同。您不是将网络传递给绘图，将布局传递给布局参数，而是传递 layout$extd_graph 且没有布局参数。我发现杉山布局在分层布局中使用时要灵活得多。

l <- layout_with_sugiyama(net)
plot(l$extd_graph, 
     vertex.shape="square", 
     vertex.label=as_ids(V(net)),
     edge.arrow.mode=2, 
     edge.arrow.width=2, 
     edge.arrow.size=0.1)