Suggestion to improve code in chapter 12

[InfiniteCuriosity]

Chapter 12 includes this code, which returns an error for me (I'll explain why in a second)

tidymodels_prefer()
llhood <- function(...) {
  logistic_reg() %>% 
    set_engine("glm", ...) %>% 
    fit(Class ~ ., data = training_set) %>% 
    glance() %>% 
    select(logLik)
}

The error is that training_set is not found:
Error in fit.model_spec(., class ~ ., data = training_set) :
object 'training_set' not found

I searched for quite a while for the training set and found it in the GitHub repo, but I'm not sure everyone will figure this out. You might want to include the code below in the code example in the book before calling on the training_set. The code above runs correctly for me once this is done.

set.seed(91)
split <- initial_split(two_class_dat)
training_set <- training(split)
testing_set <- testing(split)```

[juliasilge]

I can see why that might be confusing. It is too late for us to include this in the print version of the initial publication, but we can come back and evaluate if we want to show this code in the future.