Fit, explore, and evaluate the model
Once you have defined a workflow with a recipe and a model, you can fit the data to the workflow. This is done with the training data set. The trained model is then evaluated using the test set. In this example, the target variable is categorical and you are using a logistic regression model. So you will evaluate the test predictions using the F measure. feature_selection_recipe, lr_model, attrition_wflow, train, and test from the previous exercise are available for your use.
The tidyverse and tidymodels packages have been loaded for you.
Este exercício faz parte do curso
Dimensionality Reduction in R
Instruções do exercício
- Fit
attrition_wflowusing the training data. - Add the test predictions to the test data with the original
Attritionvalues. - Use
f_meas()to evaluate the model's performance on the test data. - Display the model estimates of
attrition_fit.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
# Fit workflow to train data
attrition_fit <-
___ %>% ___(___ = ___)
# Add the test predictions to the test data
attrition_pred_df <- ___(___, ___) %>%
bind_cols(___ %>% select(___))
# Evaluate F score
___(___, ___, ___)
# Display model estimates
___(___)