使用d3Network包绘制网络图时的空白页面

Question

我正在尝试使用d3Network包绘制网络图。我尝试组织数据以匹配package website（和帮助页面）上显示的说明，但我仍然得到一个空白的网页。谁能发现我做错了什么？

library(d3Network)

g.top3000 <- structure(list(from = structure(c(1L, 1L, 1L, 1L, 1L, 2L, 2L, 
2L, 2L, 3L, 3L, 3L, 4L, 4L, 5L), .Label = c("afghanistan", "attack", 
"people", "pres_bush", "taliban"), class = "factor"), to = structure(c(4L, 
1L, 5L, 2L, 3L, 1L, 5L, 2L, 3L, 5L, 2L, 3L, 2L, 3L, 3L), .Label = c("people", 
"taliban", "united_states", "attack", "pres_bush"), class = "factor"), 
    weight = c(4, 3, 2, 6, 5, 5, 2, 3, 6, 1, 1, 5, 2, 4, 4)), .Names = c("from", 
"to", "weight"), row.names = c(NA, -15L), class = "data.frame")

top3000.nodes <- structure(list(name = structure(1:5, .Label = c("afghanistan", 
"attack", "people", "pres_bush", "taliban"), class = "factor"), 
    id = c(1, 1, 1, 2, 2)), .Names = c("name", "id"), row.names = c(NA, 
-5L), class = "data.frame")

d3ForceNetwork(Links = g.top3000, Nodes = top3000.nodes, Source = "from", Target = "to",
Value = "weight", NodeID = "name", Group = "id", width = 800, height = 400, opacity = 0.9,
   file = "projekt2_terror_news_force.html")

绘制一个简单的图表就可以了。

d3SimpleNetwork(g.top3000, width = 800, height = 400, fontsize = 12, linkDistance = 200,
   file = "projekt2_terror_news.html")

Answer 1

那是因为

1. 节点列表中没有“统一状态”条目。
2. 您可能需要使用数字索引而不是节点名称。

---

# add entry "united status"
top3000.nodes <- rbind(top3000.nodes, data.frame(name = "united_states", id = 3))

# from name to index
g.top3000$from2 <- sapply(as.character(g.top3000$from), function(x) which(x == top3000.nodes$name))-1
g.top3000$to2 <- sapply(as.character(g.top3000$to), function(x) {
    i <- which(x == top3000.nodes$name)
    if (length(i)) i else NA
    }) -1

# use indices in "from2" and "to2"
d3ForceNetwork(Links = g.top3000, Nodes = top3000.nodes, Source = "from2", Target = "to2",
Value = "weight", NodeID = "name", Group = "id", width = 800, height = 400, opacity = 0.4,
   file = "projekt2_terror_news_force.html", linkDistance = 200)