R visNetwork：创建新型边缘

Question

我想用 visNetwork 为我闪亮的应用程序创建一个 PAG（父母祖先图）。为此，我必须创建同时具有圆圈和箭头的边。根据 visNetwork 包，我可以像这样将箭头转换为圆圈

visNetwork(nodes, edges) %>% 
  visEdges(arrows = list(to = list(enabled = TRUE, 
     scaleFactor = 2, type = 'circle')))

但是我想要一个箭头和一个圆圈，或者像这张照片一样在一个边上有两个圆圈 PAG

arrows.from.type 和 arrows.to.type 似乎可以正常工作，但我现在遇到了这个问题。我想根据邻接矩阵绘制这个图所以我有这个代码

  i = 1
  j = 1
  for(i in i:ncol(results))
  {
    j = i
    for(j in j:nrow(results))
    {
      if(results[j,i]==1)
      {
        dashBoard = c(dashBoard,TRUE)
        colorBoard = c(colorBoard, "green")
        if(results[i,j]==1)
        {
          fromtest <- c(fromtest,Cnames[i])
          totest <- c(totest,Rnames[j])
          arrfrom <-c(arrfrom,"circle")
          arrto<-c(arrto,"circle")
        }
        else if(results[i,j]==2)
        {

          fromtest<-c(fromtest,Cnames[i])
          totest<-c(totest,Rnames[j])
          arrfrom <-c(arrfrom,"circle")
          arrto<-c(arrto,"arrow")
        }}

除 1,1 和 1,2 之外的所有可能的组合都是如此最后边缘打印成那样

edgesprint <-data.frame(from = fromtest,
                          to = totest,
                          arrows.from.type=arrfrom,
                          arrows.to.type=arrto,
                          dashes = dashBoard,
                          physics = FALSE,
                          smooth = FALSE,
                          width = 3,
                          shadow = TRUE,
                          color = list(color = colorBoard, highlight =   "red", hover = "green"),
                          links = links)

此方法效果很好，但有时不更改任何代码我会收到此错误

data.frame 参数中的错误暗示行数不同

Answer 1

您可以通过添加列 arrows.to.type 和 arrows.from.type:

在 edges 数据框中设置单独的箭头类型

library(visNetwork)
library(magrittr)

nodes <- data.frame(id=c("a","b","c","d"), label=c("a","b","c","d"))
edges <- data.frame(
  from = c("a","a","a"),
  to = c("b","c","d"),
  arrows.from.type = c(NA,"circle","circle"),
  arrows.to.type = c("arrow","circle",NA)
)

visNetwork(nodes, edges)

结果：

此方法适用于您可以通过 visNodes 和 visEdges 设置的所有其他属性。有关示例，请参阅 here。

R visNetwork：创建新型边缘

R visNetwork: create new type of edges

r

graph

shiny

vis.js

visnetwork