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	25
regularization	Float	LogUniform	0.0001 ≤ \(x\) ≤ 10	0.00953
learning_rate	Float	LogUniform	0.001 ≤ \(x\) ≤ 0.1	0.0025
reg_method	Categorical	Uniform	L2, AdamW	AdamW
negative_count	Integer	Uniform	1 ≤ \(x\) ≤ 5	4
positive_weight	Float	Uniform	1 ≤ \(x\) ≤ 10	2.25
user_bias	Categorical	Uniform	True, False	False
item_bias	Categorical	Uniform	True, False	True

Final Result

Searching selected the following configuration:

{
    'embedding_size': 25,
    'regularization': 0.00952680341791649,
    'learning_rate': 0.0024979074633962118,
    'reg_method': 'AdamW',
    'negative_count': 4,
    'positive_weight': 2.251002203696023,
    'user_bias': False,
    'item_bias': True,
    'epochs': 19
}

With these metrics:

{
    'RBP': 0.18157177283063697,
    'LogRBP': 2.088135708920756,
    'NDCG': 0.4255942396129244,
    'RecipRank': 0.35156274138806104,
    'TrainTask': '80c4a230-69fc-4e26-b47e-9b2bc61f7bf3',
    'TrainTime': None,
    'TrainCPU': None,
    'max_epochs': 50,
    'done': True,
    'training_iteration': 19,
    'trial_id': '968271f1',
    'date': '2025-05-07_07-51-07',
    'timestamp': 1746618667,
    'time_this_iter_s': 43.33179569244385,
    'time_total_s': 1009.8534638881683,
    'pid': 239992,
    'hostname': 'CCI-ws21',
    'node_ip': '10.248.127.152',
    'config': {
        'embedding_size': 25,
        'regularization': 0.00952680341791649,
        'learning_rate': 0.0024979074633962118,
        'reg_method': 'AdamW',
        'negative_count': 4,
        'positive_weight': 2.251002203696023,
        'user_bias': False,
        'item_bias': True,
        'epochs': 19
    },
    'time_since_restore': 1009.8534638881683,
    'iterations_since_restore': 19
}