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K-Fold Cross validation and F1 Measure Score for Document Retrieval using TF-IDF weighting and some customised weighting schemes

I am developing a search engine system based on the vector space model, and I am confused on what approach I should take to evaluate the system. My case is this: I have a set of indexed documents ...
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Evaluation and Testsets for NNMF

I am trying to evaluate my recommender system which uses Non-negative Matrix Factorization. Some things that I evaluate are How does the size of the feature matrix affect the recommendations How ...