Has someone already written an evaluator for the hadoop implementation of cf? I was looking for something like the RecommenderEvaluator class that could basically give me the MAE or RMSE or some evaluation metric for the results i get through the MapReduce implementation of RecommenderJob. I know it shouldn't be too difficult to write one, but in case someone has written it already, it will save me a day or so. Any pointers will be appreciated.
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