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## Package prea.util

Class Summary
Distance | This is a class implementing various distance measures of two vectors.
Distribution | This class implements several statistical distributions.
EvaluationMetrics | This is a unified class providing evaluation metrics, including comparison of predicted ratings and rank-based metrics, etc.
Loss | This is a class implementing loss functions generally used in collaborative filtering algorithms.
Printer | This is a class containing printing functions in human-readable format from various kinds of data.
Sort | This is a class implementing sort functions in various data type.

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