FlexMF Logistic

This page analyzes the hyperparameter tuning results for the FlexMF scorer in implicit-feedback mode with logistic loss (Logistic Matrix Factorization).

Parameter Search Space

/home/mde48/lenskit/lenskit-codex/.venv/lib/python3.12/site-packages/ray/tune/search/sample.py:700: RayDeprecationWarning: The `base` argument is deprecated. Please remove it as it is not actually needed in this method.

Parameter	Type	Distribution	Values	Selected
embedding_size	Integer	LogUniform	4 ≤ \(x\) ≤ 512	30
regularization	Float	LogUniform	0.0001 ≤ \(x\) ≤ 10	0.0658
learning_rate	Float	LogUniform	0.001 ≤ \(x\) ≤ 0.1	0.00339
reg_method	Categorical	Uniform	L2, AdamW	AdamW
negative_count	Integer	Uniform	1 ≤ \(x\) ≤ 5	4
positive_weight	Float	Uniform	1 ≤ \(x\) ≤ 10	6.79
user_bias	Categorical	Uniform	True, False	False
item_bias	Categorical	Uniform	True, False	True

Final Result

Searching selected the following configuration:

{
    'embedding_size': 30,
    'regularization': 0.06582019563774084,
    'learning_rate': 0.003392744782918509,
    'reg_method': 'AdamW',
    'negative_count': 4,
    'positive_weight': 6.793432608396559,
    'user_bias': False,
    'item_bias': True,
    'epochs': 14
}

With these metrics:

{
    'RBP': 0.2117583124736642,
    'LogRBP': 2.2419302796252634,
    'NDCG': 0.4518275158182063,
    'RecipRank': 0.39610287024847396,
    'TrainTask': 'bac615ca-8038-4369-9e53-d82fbcfd8761',
    'TrainTime': None,
    'TrainCPU': None,
    'max_epochs': 50,
    'done': False,
    'training_iteration': 14,
    'trial_id': 'c6732d90',
    'date': '2025-05-05_22-14-14',
    'timestamp': 1746497654,
    'time_this_iter_s': 39.01932764053345,
    'time_total_s': 392.05819034576416,
    'pid': 383329,
    'hostname': 'CCI-ws21',
    'node_ip': '10.248.127.152',
    'config': {
        'embedding_size': 30,
        'regularization': 0.06582019563774084,
        'learning_rate': 0.003392744782918509,
        'reg_method': 'AdamW',
        'negative_count': 4,
        'positive_weight': 6.793432608396559,
        'user_bias': False,
        'item_bias': True,
        'epochs': 14
    },
    'time_since_restore': 68.3108901977539,
    'iterations_since_restore': 2
}