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- function [Spos,Sneg,vpos,vneg] = strengths_und_sign(W)
- %STRENGTHS_UND_SIGN Strength and weight
- %
- % [Spos Sneg] = strengths_und_sign(W);
- % [Spos Sneg vpos vneg] = strengths_und_sign(W);
- %
- % Node strength is the sum of weights of links connected to the node.
- %
- % Inputs: W, undirected connection matrix with positive
- % and negative weights
- %
- % Output: Spos/Sneg, nodal strength of positive/negative weights
- % vpos/vneg, total positive/negative weight
- %
- %
- % 2011, Mika Rubinov, UNSW
- % Modification History:
- % Mar 2011: Original
- n = length(W); %number of nodes
- W(1:n+1:end) = 0; %clear diagonal
- Spos = sum( W.*(W>0)); %positive strengths
- Sneg = sum(-W.*(W<0)); %negative strengths
- if nargout>2
- vpos = sum(Spos); %positive weight
- vneg = sum(Sneg); %negative weight
- end
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