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R Data Analysis Cookbook - Second Edition by Kuntal Ganguly

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Evaluating models and optimization

After we build the models, we must decide which model to use and its parameters. First, we can test the performance of some models and/or parameter configurations and then choose the one that performs best with the dataset under consideration.

This recipe will show you how to evaluate recommender models and compare their performances to choose the most appropriate model with optimized parameters.

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