empty page when plotting a network graph using d3Network package - r

Question

I'm trying to plot a network graph using the d3Network package. I tried organizing the data to match the instructions as they appear on the package website (and help page), but I still get a blank web page. Can anyone spot what I'm doing wrong?
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")
Plotting a simple graph works just fine
d3SimpleNetwork(g.top3000, width = 800, height = 400, fontsize = 12, linkDistance = 200,
file = "projekt2_terror_news.html")

Answer 1

That's because
No entry of "united status" in the node list.
You may need to use numeric index instead of node name.
# 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)