14 lines
451 B
Matlab
14 lines
451 B
Matlab
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% Graph energy defined as: the sum of the absolute values of the
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% real components of the eigenvalues of the adjacency matrix.
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% Source: Gutman, The energy of a graph, Ber. Math. Statist.
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% Sekt. Forsch-ungszentram Graz. 103 (1978) 1-22.
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%
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% INPUTs: adjacency matrix, nxn
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% OUTPUTs: graph energy
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%
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% GB: last updated, Oct 10 2012
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function G=graphEnergy(adj)
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[~,e]=eig(adj); % e are the eigenvalues
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G=sum(abs(real(diag(e))));
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