Training Data and Precision/Recall evaluation

[Daniel Quach]

I want to use the GenericRecommenderIRStatsEvaluator to get precision/recall 
scores for my recommenders.

I know with the other recommender evaluators, you can specify the split of 
training data and test data. However, I see no such parameter for the IR Stats 
evaluator. Am I missing something here, or is it not sensible to split the data 
for this kind of evaluation?