Basically I have a training set and test set given, the training set is what i will test various models and feature selections on, i know the output labels of the training set and they are of 10 different categories, but I am told/given that one of the particular classes has 0 given samples/occurences in the training set.
How do I deal with this?
I know I can use oversampling/undersampling with imbalanced sets, but will it help for this if one of the classes has 0 occurences?