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guoguibing / librec

LibRec: A Leading Java Library for Recommender Systems, see
https://www.librec.net/
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Prediction number is the same across all results #242

Closed FotisSp closed 6 years ago

FotisSp commented 6 years ago

I copied the code from librec github but every evaluator i tried it gives me the same evaluation across all results. Also the RMSE is always a big number for example 21.776... Any thoughts on what might be wrong ? Thanks

zhao-json commented 6 years ago

Could you verify if you are able to access the training data?

allenjack commented 6 years ago

Hi, Could you check that the ground truth and prediction, which are passed into the evaluator, are expected?

FotisSp commented 6 years ago

@zhao-json yes i just tested it and the training data seems okay.

My data set consists of (users,topics,[number of times user talk about the topic])

@allenjack if i understand correctly what you said i found a user that talked 11 times about a topic and the prediction that i got was 6.343374051452897. This is the value that i get across all the predictions.

image

this is a sample of the recommendations that i get.