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%ÐγɽáµãÎ»ÒÆ±àÂë¾ØÕó
function nf = formnf (nf)
[nRow , nCol] = size(nf);
m=0;
for j=1:nCol
    for i=1:nRow
    if nf(i,j)~=0
        m= m + 1;
        nf(i,j) = m;
    end
end
end
%¼ÆËã½áµãÎ»ÒÆ±àÂë
function g= numtog (num,nf)
nod = length(num);
nodof = size(nf,1);
for i = 1:nod
    k = i*nodof;
    g(k-nodof+1:k) = nf(:,num(i));
end
end
%¼ÆËã´æ´¢Ö÷¶Ô½ÇÔªËØµØÖ·
function kdiag = fkdiag (kdiag,g)
idof = size(g,2);
for i= 1:idof
    iwp1 = 1;
    if g(i) ~= 0
        for j = 1:idof
            if g(j) ~= 0
                im = g(i) - g(j) +1;
                if im > iwp1
                    iwp1 = im;
                end
            end
        end
        k = g(i);
        if iwp1 > kdiag(k)
            kdiag(k) = iwp1;
        end
    end
end
end
%¼¯×°×ÜÌå¸Õ¶È¾ØÕó
function kv = fsparv(kv,km,g,kdiag)
idof = length(g);
for i = 1:idof
    k=g(i);
    if k~= 0
        for j =1:idof
            if g(j)~= 0
                iw = k- g(i);
                if iw >= 0
                    ival = kdiag(k) - iw
                    kv(ival) = kv(ival) + km(i,j);
                end
            end
        end
    end
end
end
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