33 lines
801 B
Matlab
33 lines
801 B
Matlab
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% Find the connected component to which node "i" belongs to
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%
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% INPUTS: adjacency matrix and index of the key node
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% OUTPUTS: all node indices of the nodes in the same group
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% to which "i" belongs to (including "i")
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%
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% Note: Only works for undirected graphs.
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% Other functions used: kneighbors.m
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% GB: last updated, Sep 22 2012
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function comp=findConnCompI(adj,i)
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neigh1=kneighbors(adj,i,1); % all neighbors of "i" 1 link away
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neigh1=unique([neigh1 i]); % add i to its own component
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while 1
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len0=length(neigh1);
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for j=1:len0
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neigh2=kneighbors(adj,neigh1(j),1);
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neigh1=unique([neigh1, neigh2]); % merge neigh1 and neigh2
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end
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if len0==length(neigh1) % if no new neighbors found, return component
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comp=neigh1;
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return
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end
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end
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end % end of function
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