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Left: unsupervised NMF based on 6 types. The blue points are from IBD patients and the green ones are from healthy people. Right: supervised NMF on both training and test data. The blue points are training data from patients, and green points are training data from healthy people; the dark blue points are test data from patients, and the dark green points are test data from healthy people. a Unsupervised NMF. b Supervised NMF
