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Thomas (Tom) C. Gorordo 2024-05-22 02:34:34 -07:00
parent 98da744bf0
commit 0cee74ff54
Signed by: tgorordo
GPG key ID: 0CBED22BB0D94490
3 changed files with 6 additions and 19 deletions
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traveling-tommys.jl
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@ -190,7 +190,7 @@ LightOSM.total_path_weight(::LightOSM.OSMGraph{U, T, W}, ::Nothing) where {U, T,
# ╔═╡ a868a31f-2cc7-4283-b0e6-27c50f43a3be
d = let nodes = map(l -> nearest_node(g, l)[1], collect.(df[!,:latlon]))
[ total_path_weight(g, shortest_path(g, a, b)) for a=nodes, b=nodes]
[total_path_weight(g, shortest_path(g, a, b)) for a=nodes, b=nodes]
end
# ╔═╡ 63333464-4a87-4b14-9507-57cbcdd3d734
@ -202,7 +202,8 @@ function build_tsp_model(m)
model = Model(GLPK.Optimizer)
@variable(model, x[1:n, 1:n], Bin, Symmetric)
@objective(model, Min, sum(m .* x) / 2)
@constraint(model, [i in 1:n], sum(x[i, :]) == 2)
@constraint(model, [i in 1:n], sum(x[i, [j for j in 1:n if j != i]]) == 1)
@constraint(model, [j in 1:n], sum(x[[i for i in 1:n if i != j], j]) == 1)
@constraint(model, [i in 1:n], x[i, i] == 0.)
return model
end