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This is an implementation of (7,4) hamming code using belief propagation

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from This is an implementation of (7,4) hamming code using belief propagation by Shuang Wang
An implementation of (7,4) hamming code using belief propagation

sumMsg(x, edgeIDArray, messageV2F, jV) 
function val = sumMsg(x, edgeIDArray, messageV2F, jV)
    edgeIDArray(jV) = [];
    nV = length(edgeIDArray);
    len = 2^nV;
    val = 0;
    for i = 1: len
        binArray = rot90(dec2binvec(i-1,nV),2);
        prodVal = fun2(x, binArray);
        if(prodVal ~= 0)
            for j = 1 : nV
                edgeID = edgeIDArray(j);
                prodVal = prodVal * messageV2F(edgeID,binArray(j)+1);
            end;
        end;      
        val = val + prodVal;
    end;
end

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