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[Port] fix induced_subgraph indexing with vector of Bools #22

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merged 2 commits into from
Jan 9, 2022
Merged

[Port] fix induced_subgraph indexing with vector of Bools #22

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81a3284
fix induced_subgraph indexing with vector of Bools
bkamins Jul 5, 2021
8bbf1c5
add tests
bkamins Jul 5, 2021
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4 changes: 4 additions & 0 deletions src/operators.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -659,6 +659,10 @@ function induced_subgraph(g::T, vlist::AbstractVector{U}) where T <: AbstractGra
return h, vmap
end

function induced_subgraph(g::AbstractGraph, vlist::AbstractVector{Bool})
length(vlist) == length(g) || throw(BoundsError(g, vlist))
return induced_subgraph(g, findall(vlist))
end

function induced_subgraph(g::AG, elist::AbstractVector{U}) where AG <: AbstractGraph{T} where T where U <: AbstractEdge
h = zero(g)
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14 changes: 14 additions & 0 deletions test/operators.jl
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Expand Up @@ -273,6 +273,14 @@
@test h2 == h
@test vm == collect(r)
@test h2 == g[r]

r2 = falses(length(g))
r2[r] .= true
h2, vm = @inferred(induced_subgraph(g, r2))
@test h2 == h
@test vm == findall(r2)
@test h2 == g[r2]

end

g10 = complete_graph(10)
Expand All @@ -285,6 +293,12 @@
@test sg2 == sg
@test vm[4] == 8

bv = falses(length(g))
bv[5:8] .= true
sg2, vm = @inferred(induced_subgraph(g, bv))
@test sg2 == sg
@test vm[4] == 8

elist = [
SimpleEdge(1, 2), SimpleEdge(2, 3), SimpleEdge(3, 4),
SimpleEdge(4, 5), SimpleEdge(5, 1)
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