What is the most appropriate distance measure for e-commerce data (explained in details below) to apply nearest neighbour algorithm? -


i have dataset of e-commerce website. data arranged in matrix number of rows same number of transactions (set of products bought) , number of columns same total number of products available on website. each [i, j] cell of matrix either 1 if product j bought in transaction i or 0 otherwise. when new transaction comes, want find k nearest neighbours transaction. appropriate measure such data? e.g. if data binary (1/0), hamming distance won't make sense.


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