使用 igraph 和 R 绘制没有链接的节点答案

【问题标题】：Plotting nodes with no links using igraph and R使用 igraph 和 R 绘制没有链接的节点
【发布时间】：2019-05-29 20:41:46
【问题描述】：

我正在使用 igraph 包绘制如下网络，但我希望能够显示图中的所有节点（作者），即使是那些与其他人没有联合论文的作者。这可能吗？

PubID <- c("169759","174843","174843","174843","174843","174843","171051","171051","171051","171719","171719","171719","169759","173847","173847","177427")
Author <- c("ZJ","RA","DJ","JP","GS","Tv","MC","JR","CW","PB","MD","FO","FO","RA","DJ","KS")
dt <- data.frame(Author,PubID)
library(tidyverse)
library(igraph)
dt %>%
  mutate(author_id = as.integer(Author)) -> dt
dt %>%
  inner_join(dt, by = "PubID") %>%
  filter(author_id.x < author_id.y) %>%
  count(Author.x, Author.y) %>%
  graph_from_data_frame(directed = FALSE) -> g1
plot(g1)
as_data_frame(g1, what = "edges")

我想显示网络，然后将“KS”作者显示为图中的单个节点。

【问题讨论】：

标签： r igraph

【解决方案1】：

首先我们找到所有尚未出现的人：

(rest <- setdiff(Author, V(g1)$name))
# [1] "KS"

然后添加它们

g1 <- add.vertices(g1, length(rest), attr = list(name = rest))

【讨论】：

谢谢你，这行得通！我在使用更大的网络时意识到，如果“KS”有多个 PubID，一个与另一位作者联合，一个是唯一的，则“KS”既显示在连接的网络中，也显示为单个节点。如果 KS 完全不连接，有没有办法只显示为单个节点？
例如KS 不会在此数据图中显示为单个节点PubID <- c("169759","174843","174843","174843","174843","174843","171051","171051","171051","171719","171719","171719","169759","173847","173847","177427","169759") Author <- c("ZJ","RA","DJ","JP","GS","Tv","MC","JR","CW","PB","MD","FO","FO","RA","DJ","KS","KS")
@otter77，我真的看不出你所说的情况：如果“KS”已经与某人建立联系，那么“KS”将不会出现在rest中，因此不会包含在内作为一个孤立的节点。
我认为这与 V(g1)$name 作为 author_id 而不是我实际代码中的作者姓名有关。所以“休息”不起作用，因为它正在将名称与 id 进行比较，因此所有内容都被拉过。
虽然现在已修复，但我的一个顶点命令中出现了错误。感谢您的帮助！