How to find graph density in MATLAB for a given graph G?

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Nadatimuj
Nadatimuj 2021-7-2
评论： Nadatimuj 2021-7-3
I want to find the density of a graph in matlab. Is there any function to find that? Thanks.

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Kelly Kearney
Kelly Kearney 2021-7-2
You can simply calculate the number of non-zero elements relative to total elements in the adjacency matrix:
nnz(adjacency(G))./numel(adjacency(G))
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Steven Lord
Steven Lord 2021-7-3
You can use the numnodes and numedges functions on a graph or digraph to get the numbers of nodes or edges respectively.
Nadatimuj
Nadatimuj 2021-7-3
Great, thanks. So this one works too:
%http://reference.wolfram.com/language/ref/GraphDensity.html
graph_density = numedges(G)/numnodes(G) /(numnodes(G) -1)*2 %factor 2 for undirected, factor 1 for directed

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