## Multigraphs.jl

A multigraph extension of LightGraphs.jl
Author QuantumBFS
Popularity
17 Stars
Updated Last
2 Years Ago
Started In
February 2020

# Multigraphs

Multigraphs extension for `LightGraphs.jl`.

## Installation

Multigraphs is a   Julia Language   package. To install Multigraphs, please open Julia's interactive session (known as REPL) and press ] key in the REPL to use the package mode, then type the following command

`pkg> add Multigraphs`

## Examples

```using LightGraphs, Multigraphs

# create a undirected multigraph with 3 vertices and 0 multiple edges
# use DiMultigraph for directed multigraphs
julia> mg = Multigraph(3)
{3, 0} undirected Int64 multigraph with Int64 multiplicities

# add a multiple edge from 1 to 2 with multiplicity 2
true

# add a simple edge (multiple edge with multiplicity 1) from 2 to 3
true

# this will increase multiplicity of the edge from 2 to 3 by 2
true

# this will decrease multiplicity of the edge from 2 to 3 by 1
julia> rem_edge!(mg, 2, 3, 2)

# here me is a MultipleEdge
julia> mes = [me for me in edges(mg)]
2-element Array{MultipleEdge{Int64,Int64},1}:
Multiple edge 1 => 2 with multiplicity 2
Multiple edge 2 => 3 with multiplicity 1

# here e is a LightGraphs.SimpleEdge
julia> for e in mes[1]
println(e)
end
Edge 1 => 2
Edge 1 => 2
```