How to interpret the result?

[Wang Dawei]

I ran this command:

$ rating_prediction --training-file=ml-100k/u1.base --test-file=ml-100k/u1.test --recommender=SVDPlusPlus --recommender-options=num_factors=50 --recommender-options=regularization=1 --recommender-options=bias_reg=0.005 --recommender-options=learn_rate=0.01 --recommender-options=bias_learn_rate=0.07 --recommender-options=num_iter=50 --recommender-options=frequency_regularization=true

and I get this result:

readlink: illegal option -- f

usage: readlink [-n] [file ...]

loading_time 0.12

memory 5

ratings range: [1, 5]

training data: 943 users, 1650 items, 80000 ratings, sparsity 94.85845

test data:     459 users, 1410 items, 20000 ratings, sparsity 96.90972

SVDPlusPlus num_factors=50 regularization=1 bias_reg=0.005 frequency_regularization=True learn_rate=0.01 bias_learn_rate=0.07 learn_rate_decay=1 num_iter=50  training_time 00:07:30.4983950 RMSE 0.921024 MAE 0.7258533 CBD 0.2558339 new items: RMSE 1.25027 MAE 1.00147 CBD 0.2406 testing_time 00:00:00.0259000

memory 7

I wonder what's the difference of MAE and the MAE after new items?

[Zeno Gantner]

MAE is MAE for all items.

new item MAE is the MAE computed for only the new items, that is items that are absent from the training set.

Cheers,

   Z.

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[Dawei Wang]

Thank you for your fast reply!

much appreciated!

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