R 使用长格式数据的节点创建图形打印

有这样一个数据集：

df1 <- data.frame(id = c(1,1,1,2,2,3),
                  snames = c("stockA","stockB","stockC","stockA","stockB","stockC"),
                  var1 = c(0.13,1.2,-1.5,3.45,-0.26,-2.1), 
                  var2 = c(-2.1,2.34,3.56,-1.53,-0.48,-0.29), 
                  var3 = c(0.04,-3.45,-0.22,-0.29,1.34,0.32), 
                  var4 = c(2.14,-1.34,-4.35,-1.56,0.13,-2.35), 
                  var5 = c(1.53,1.24,-0.32,-0.3,-4.25,-2.49))

---

df1我不了解数据结构，节点是
snames
，边缘，比如说，
var1
从哪个节点到哪个节点？@RuiBarradas monic node:stockA->stockBYes，但是优势是0.13或1.2？如果你把你已经尝试过的东西包括进来，你的逻辑可能会更清晰，否则这是一个相当模糊的任务，你要求人们去做