tifuknn_tafeng.py

# Copyright 2023 The Cornac Authors. All Rights Reserved.
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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#
#     http://www.apache.org/licenses/LICENSE-2.0
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# ============================================================================
"""Example of Temporal-Item-Frequency-based User-KNN (TIFUKNN)"""

import cornac
from cornac.eval_methods import NextBasketEvaluation
from cornac.metrics import NDCG, HitRatio, Recall
from cornac.models import TIFUKNN

data = cornac.datasets.tafeng.load_basket(reader=cornac.data.Reader(min_basket_size=3, max_basket_size=50, min_basket_sequence=2))

next_basket_eval = NextBasketEvaluation(data=data, fmt="UBITJson", test_size=0.2, val_size=0.08, seed=123, verbose=True)

models = [
    TIFUKNN(
        n_neighbors=300,
        within_decay_rate=0.9,
        group_decay_rate=0.7,
        alpha=0.7,
        n_groups=7,
    )
]

metrics = [
    Recall(k=10),
    Recall(k=50),
    NDCG(k=10),
    NDCG(k=50),
    HitRatio(k=10),
    HitRatio(k=50),
]

cornac.Experiment(eval_method=next_basket_eval, models=models, metrics=metrics).run()