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quantombone/count_with_sparse.m

Created March 25, 2011 18:08
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Counting in Matlab using sparse
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count_with_sparse.m
function count_with_sparse
%Find item co-occurences using sparse
%Tomasz Malisiewicz
item1 = [1 3 1 4 3];
item2 = [2 2 2 1 2];
N = 4;
counts = sparse(item1,item2,1,N,N)
imagesc(full(counts))
title('Counts using Sparse')
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