Temel seviye

attrition_num veri kümesiyle devam ederek, ek özellik mühendisliği adımlarının etkilerini değerlendirmek için düz bir recipe ile bir temel seviye oluşturacaksın. attrition_num verisi, lojistik regresyon lr_model, kullanıcı tanımlı class-evaluate() fonksiyonu ile train ve test ayrımları senin için önceden yüklendi.

Bu egzersiz

R'da Feature Engineering

kursunun bir parçasıdır

Kursu Görüntüle

Egzersiz talimatları

Modeli ve recipe'i bir workflow içinde birleştir.
Değerlendirmeye hazırlamak için eğitilmiş workflow'u augment et.

Uygulamalı interaktif egzersiz

Bu örnek kodu tamamlayarak bu egzersizi bitirin.

lr_recipe_plain <- recipe(Attrition ~., data = train)

# Bundle the model and recipe
lr_workflow_plain <- workflow() %>%
  ___(lr_model) %>%
  ___(lr_recipe_plain)
lr_fit_plain <- lr_workflow_plain %>%
  fit(train)

# Augment the fit workflow
lr_aug_plain <- lr_fit_plain %>%
  ___(___)
lr_aug_plain %>%
  class_evaluate(truth = Attrition,estimate = .pred_class,
                 .pred_No)

Kodu Düzenle ve Çalıştır

R'da Feature Engineering

IntermediárioNível de habilidade

4.8+

120 reviews

You’ll wrap up the course by learning about feature engineering and machine learning techniques. You’ll begin by focusing on the problems associated with using all available features in a model and the importance of identifying irrelevant and redundant features and learning to remove these features using embedded methods such as lasso and elastic-net. Next, you’ll explore shrinkage methods such as lasso, ridge, and elastic-net, which can be used to regularize feature weights or select features by setting coefficients to zero. Finally, you’ll finish by focusing on creating an end-to-end feature engineering workflow and reviewing and practicing the previously learned concepts and functions in a small project.

Exercise 1: Reducing the model's features Exercise 2: Sifting through variable importance Exercise 3: Assessing model performance using all available predictors Exercise 4: Building a reduced model Exercise 5: Shrinkage methods Exercise 6: Manual regularization with Lasso Exercise 7: Tuning the penalty Exercise 8: Finalizing the model Exercise 9: Putting it all together Exercise 10: Prep and split Exercise 11: Preprocess Exercise 12: Model Exercise 13: Assess Exercise 14: Congratulations!