如何进行R语言网络图的分析

nodes<-read.csv("Data_files/Dataset1-Media-Example-NODES.csv",
                header=T,as.is = T)
links<-read.csv("Data_files/Dataset1-Media-Example-EDGES.csv",
                header=T,as.is=T)
nodes
links
dim(nodes)
dim(links)
library(igraph)
net<-graph_from_data_frame(d=links,
                           vertices=nodes,directed=T)
net
library(ggraph)
ggraph(net)+
  geom_edge_link(color="green")+
  geom_node_point(color="red",size=10)+
  theme_void()

ggraph(net,layout="lgl")+
  geom_edge_link()+
  theme_void()

ggraph(net,layout="lgl")+
  geom_edge_fan()+
  geom_node_point(color=V(net),size=8)+
  theme_void()

ggraph(net, layout = 'linear') +
  geom_edge_arc(color = "orange", width=0.7) +
  geom_node_point(size=5, color="gray50") +
  theme_void()

ggraph(net, layout="lgl") +
  geom_edge_link(aes(color = type)) + # colors by edge type
  geom_node_point(aes(size = audience.size)) + # size by audience size
  theme_void()

ggraph(net, layout = 'lgl') +
  geom_edge_arc(color="gray", curvature=0.3) +
  geom_node_point(color="orange", aes(size = audience.size)) +
  geom_node_text(aes(label = media), size=2, color="gray50", repel=T) +
  theme_void()

教程中的例子可以重复出来，但是如何准备自己的数据呢？
尝试模仿

df1<-data.frame(id=c("A","B","C"))
df2<-data.frame(from=c("A","A","B","C"),
                to=c("B","C","C","B"),
                type=c("hyperlink","hyperlink","mention","mention"),
                weight=c(30,10,20,50))
net1<-graph_from_data_frame(d=df2,vertices = nodes)

遇到报错

Error in graph_from_data_frame(d = df2, vertices = nodes) : 
  Some vertex names in edge list are not listed in vertex data frame

暂时还不知道如何解决！