imsl.data_mining.FrequentItemSets.frequency¶
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FrequentItemSets.
frequency
(x)¶ Count the frequency of each itemset in a transaction data set.
Parameters: x ((n, 2) array_like) – An array of transaction ID and item ID pairs. Returns: An array containing the number of occurrences of each candidate itemset in x. Return type: *ndarray*