CODEWITHSUNDEEP
r
A_K
A_K

Reputation: 89

Turn list to a graph

I have a function that lists all the accessible environments in the current session.

Edited output:

[[1]]
<environment: R_GlobalEnv>

[[2]]
<environment: package:igraph>
attr(,"name")
[1] "package:igraph"
attr(,"path")
[1] "/Library/Frameworks/R.framework/Versions/4.1-arm64/Resources/library/igraph"

[[3]]
<environment: package:stats>
attr(,"name")
[1] "package:stats"
attr(,"path")
[1] "/Library/Frameworks/R.framework/Versions/4.1-arm64/Resources/library/stats"

[[4]]
<environment: R_EmptyEnv>

[[5]]
<environment: namespace:igraph>

[[6]]
<environment: namespace:stats>

Could you advise approach to convert this list to a graph? I want to plot it with igraph later. Elements 1, 2, 3 probably should be nodes, but then what is the best way to denote edges, connecting parent and child environments?

Upvotes: 1

Views: 241

Answers (1)

Allan Cameron
Allan Cameron

Reputation: 173898

The obvious way to do this is to create an edgelist as a two-column character matrix with each environment's name in the left column, and its parent's name in the right column:

library(igraph)

my_envs <- env_list(globalenv())

edgelist <- t(sapply(my_envs[-length(my_envs)], function(x) {
   c(environmentName(x), environmentName(parent.env(x)))
}))

g <- graph_from_edgelist(edgelist)

plot(g)

enter image description here

Upvotes: 2

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