error in random forest
I've had the same problem and solved it by removing the cases with the new levels - they need to be handled some other way, either by building a new model or reassigning the factor level to one in the training set.
Nagu wrote:
Hi, I get the following error when I try to predict the probabilities of a test sample: Error in predict.randomForest(fit.EBA.OM.rf.50, x.OM, type = "prob") : New factor levels not present in the training data I have about 630 predictor variables in the dataset x.OM (25 factor variables and the remaining are continuous variables). Any ideas on how to trace it? Thank you, Nagu
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