Hello! I'm trying to work through the data examples in the book. In the second chapter, I had trouble creating the plot for the censorship data. I had an error that said NULL value passed as symbol address. Everything else worked fine. I decided to move to Chapter 3 and the Krackhardt data. I'm getting the same error. Please see below for my syntax and the error message. (I'm also now getting an error on creating the tenure object. Do you have any suggestions? Thanks!

Danette

library(network)
library(ina)

data(Krackhardt)
Net <- Krackhardt

par(mfrow = c(1, 3))
set.seed(1)
Pal <- colorRampPalette(c("#e5f5e0", "#31a354"))

tenure <- get.vertex.attribute(Net, "Tenure")
col.tenure <- Pal(length(unique(tenure))) [
as.numeric(cut(tenure, breaks = length(unique(tenure))))
]

plot(Net, edge.col="gray", label.col="black", vertex.cex=1.5, vertex.col=col.tenure, label=tenure,
main="Tenure")

library(network)
library(ina)
data(Krackhardt)
Net <- Krackhardt
par(mfrow = c(1, 3))
set.seed(1)
Pal <- colorRampPalette(c("#e5f5e0", "#31a354"))
tenure <- get.vertex.attribute(Net, "Tenure")
Error in get.vertex.attribute(Net, "Tenure") : Not a graph object
col.tenure <- Pal(length(unique(tenure))) [

• as.numeric(cut(tenure, breaks = length(unique(tenure))))
• ]
  Error in unique(tenure) : object 'tenure' not found

plot(Net, edge.col="gray", label.col="black", vertex.cex=1.5, vertex.col=col.tenure, label=tenure,

•  main="Tenure")
  

Error in .Call(getEdgeAttribute_R, el, attrname, na.omit, null.na, deleted.edges.omit) :
NULL value passed as symbol address

To just install_github("jason-morgan/ina"), errors as follows show up.

During installation ...

Then, this is at the very end when finishing installation:

What's going on?

Hi there,

Thanks for this helpful package and a great book! I'm using it for the inferential network class I teach, and it helps a lot.

In section 4.5, you present a bipartite model from Lubell and Robbins (2017). I have looked for the data in the ina package but could not find it. I also tried to source it from the supporting material of the paper. Still, no luck.

Apologies, if the data is there and I could not find it, could you tell me where to get it, or could you insert it in this package?

Many thanks,
Claudia