[jira] [Created] (FLINK-2108) Add score function for Predictors

[Shang Yuanchun (Jira)]

Theodore Vasiloudis created FLINK-2108:
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             Summary: Add score function for Predictors
                 Key: FLINK-2108
                 URL: https://issues.apache.org/jira/browse/FLINK-2108
             Project: Flink
          Issue Type: Improvement
          Components: Machine Learning Library
            Reporter: Theodore Vasiloudis
            Priority: Minor


A score function for Predictor implementations should take a DataSet[(I, O)] and an (optional) scoring measure and return a score.

The DataSet[(I, O)] would probably be the output of the predict function.

For example in MultipleLinearRegression, we can call predict on a labeled dataset, get back predictions for each item in the data, and then call score with the resulting dataset as an argument and we should get back a score for the prediction quality, such as the R^2 score.



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