BRISMF

Matrix factorization with explicit ratings, learning is performed by stochastic gradient descent.

Signals

Inputs:

• Data

  Data set.

• Preprocessor

  Preprocessed data.

Outputs:

• Learner

  The learning algorithm with the supplied parameters

• Predictor

  Trained recommender. Signal Predictor sends the output signal only if input Data is present.

• P

  Latent features of the users

• Q

  Latent features of the items

Description

BRISMF widget uses a biased regularized algorithm to factorize a matrix into two low rank matrices as it’s explained in Y. Koren, R. Bell, C. Volinsky, Matrix Factorization Techniques for Recommender Systems. IEE Computer Society, 2009.

Example

Below is a simple workflow showing how to use both the Predictor and the Learner output. For the Predictor we input the prediction model into Predictions widget and view the results in Data Table. For Learner we can compare different learners in Test&Score widget.