wehub-resource-sync
17 lines
560 B
Matlab
Executable File
17 lines
560 B
Matlab
Executable File
function A = lattice( sz )
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% Create an undirected graph corresponding to sz lattice
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% Example:
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% plot(graph(lattice([2,2,3])))
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% Input:
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% sz: 1 x d size of lattice
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% Output:
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% A: prod(sz) x prod(sz) adjacent matrix of an undirected graph
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% Written by Mo Chen (sth4nth@gmail.com)
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d = numel(sz);
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step = cumprod(sz);
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n = step(end);
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M = reshape(1:n,sz);
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S = arrayfun(@(i) reshape(slice(M,i,1:sz(i)-1),1,[]), 1:d,'UniformOutput',false);
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T = arrayfun(@(i) reshape(slice(M,i,2:sz(i)),1,[]), 1:d,'UniformOutput',false);
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A = sparse([S{:}],[T{:}],1,n,n);
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A = A+A'; |