[R] test logistic regression model
gm@|om@ok|1980 @end|ng |rom gm@||@com
Sun Nov 20 16:29:30 CET 2022
Yes, was trying to fill the not existing categories with NAs, but the
suggested solutions in stackoverflow.com unfortunately did not work.
Bert Gunter <bgunter.4567 using gmail.com> schrieb am So., 20. Nov. 2022, 16:20:
> You can't predict results for categories that you've not seen before
> (think about it). You will need to remove those cases from your test set
> (or convert them to NA and predict them as NA).
> -- Bert
> On Sun, Nov 20, 2022 at 7:02 AM Gábor Malomsoki <gmalomsoki1980 using gmail.com>
>> Dear all,
>> i have created a logistic regression model,
>> on the train df:
>> mymodel1 <- glm(book_state ~ TG_KraftF5, data = train, family =
>> then i try to predict with the test df
>> Predict<- predict(mymodel1, newdata = test, type = "response")
>> then iget this error message:
>> Error in model.frame.default(Terms, newdata, na.action = na.action, xlev =
>> Factor "TG_KraftF5" has new levels
>> i have tried different proposals from stackoverflow, but unfortunately
>> did not solved the problem.
>> Do you have any idea how to test a logistic regression model when you have
>> different levels in train and in test df?
>> thank you in advance
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>> and provide commented, minimal, self-contained, reproducible code.
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