How to use splitapply/findgroups on clustered/non-sequential graphs

Chinenye Ezeh

2019 2 13

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I implemented the splitapply function on a graph that has non-sequential clusters. The index numbers of the returned clusters were sequentially numbered but the graph vertices are not sequentially numbered. I want it to return the exact node indices from the original graph.

% The actual results: clusters: [1,2,3];[4,5,6] 
% The expected results: clusters: [1,2,3];[6,8,9]
G = graph([1 1 2 6 6 8],[2 3 3 8 9 9]);
plot(G)
bins=conncomp(G);
clusters = splitapply(@(x) {x}, 1:numnodes(G), bins);