Reading and writing graphs
Saving using custom LG
format.
Graphs may be written to I/O streams and files using the savegraph
function, and they can be read with the loadgraph
function. The default graph format is a bespoke compressed format called LG
, defined by Graphs.jl.
Example
g = erdos_renyi(5, 0.2)
savegraph("mygraph.lgz", g)
reloaded_g = loadgraph("mygraph.lgz")
In addition, graphs can also be saved in an uncompressed format using the compress=false
option.
savegraph("mygraph.lg", g, compress=false)
reloaded_g = loadgraph("mygraph.lg")
Finally, dictionaries of graphs can also be saved and subsequently re-loaded one by one.
graph_dict = Dict("g1" => erdos_renyi(5, 0.1),
"g2" => erdos_renyi(10, 0.2),
"g3" => erdos_renyi(2, 0.9))
savegraph("mygraph_dict.lg", graph_dict)
# Re-load only graph g1
reloaded_g1 = loadgraph("mygraph_dict.lg", "g1")
GraphIO for other formats
The GraphIO.jl library provides tools for importing and exporting graph objects using common file types like edgelists, GraphML, Pajek NET, and more.