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Machine Learning with Spark - Second Edition by Nick Pentreath, Manpreet Singh Ghotra, Rajdeep Dua

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Using MLlib's built-in evaluation functions

While we have computed MSE, RMSE, and MAPK from scratch, and it's a useful learning exercise to do so, MLlib provides convenience functions to do this for us in the RegressionMetrics and RankingMetrics classes.

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