-
-
Save vtjnash/3355121 to your computer and use it in GitHub Desktop.
Actor centrality in Julia
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
type Node | |
name::UTF8String | |
sn::Set{Node} | |
n::Vector{Node} #this is assigned later, as an efficiently iterable copy of sn | |
Node(name) = new(name, Set{Node}()) | |
end | |
typealias Graph Dict{UTF8String, Node} | |
function get(G::Graph, name) | |
if has(G, name) | |
return G[name] | |
end | |
G[name] = Node(name) | |
end | |
function centrality_mean(G::Graph, start_node, next, nnext) | |
dists = Dict{Node,Uint64}() | |
del_all(next) | |
del_all(nnext) | |
push(next, G[start_node]) | |
cdist = 0 | |
while !isempty(next) | |
del_all(nnext) | |
for n in next | |
if !has(dists, n) | |
dists[n] = cdist | |
for neigh in n.n | |
push(nnext, neigh) | |
end | |
end | |
end | |
cdist += 1 | |
next,nnext = nnext,next | |
end | |
mean([ v for (k,v) in dists ]) | |
end | |
function read_graph() | |
G = Graph() | |
actors = Set() | |
open("imdb-1.tsv", "r") do io | |
while !eof(io) | |
k = split(strip(readline(io)), "\t") | |
actor, movie = k[1], join(k[2:3], "_") | |
ac, mn = get(G, actor), get(G, movie) | |
add(actors, actor) | |
add(ac.sn, mn) | |
add(mn.sn, ac) | |
end | |
end | |
for (k,n) = G | |
n.n = elements(n.sn) | |
del_all(n.sn) | |
end | |
G, sort!([ a for a in actors]) | |
end | |
function main() | |
G, actors = read_graph() | |
d = Dict{UTF8String, Float64}() | |
n = Node[] | |
nn = Node[] | |
for a in actors[1:100] | |
d[a] = centrality_mean(G, a, n,nn) | |
print("$a: ", d[a], "\n") | |
end | |
vals = sort!([(v,k) for (k,v) in d]) | |
for i=1:20 | |
print("$i: ", vals[i], "\n") | |
end | |
# print(centrality_mean(G, "Hoffman, Dustin"), "\n") | |
end | |
print("Elapsed: ", @elapsed main(), "\n") |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment