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Revision 495
(checked in by cbc, 11 years ago)
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Initial import of Stark code.
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function mi=mapind(x,y,l,m) |
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% mi=mapind(x,y,l,ele,xgrid,ygrid) |
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% |
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% Maps individuals at positions (X,Y) in element L onto a finite |
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% element mesh, providing an estimate of the density of individuals. |
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xl=m.x(m.e); |
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yl=m.y(m.e); |
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A= [ xl(:,1) .* (yl(:,2) - yl(:,3)) + ... |
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xl(:,2) .* (yl(:,3) - yl(:,1)) + ... |
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xl(:,3) .* (yl(:,1) - yl(:,2)) ]/2; |
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nnode=max(m.e(:)); |
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mi=zeros(nnode,1); |
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[p,n]=phi(x,y,l,ele,xgrid,ygrid); |
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l3=l*ones(1,3); |
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p=p./A(l3); |
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n=[n(:);[1:nnode+1]']; |
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p=[p(:);zeros(nnode+1,1)]; |
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[n,i]=sort(n(:)); |
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p=p(i); |
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pcs=cumsum(p); |
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nind=[find(diff(n))]; |
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mi=diff([0;pcs(nind)]); |
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mi=mi.*(mi>=0); |
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