Valutare precision e ROI

In questo esercizio, partirai da quello precedente per eseguire un MLPClassifier e confrontarlo con tre degli altri classifier usati in precedenza. Per ogni classifier, calcolerai la precision e il ROI implicito sulla spesa pubblicitaria. Come prima, abbiamo gli split di training e test per X e y come X_train, X_test per X e y_train, y_test per y, rispettivamente, e le feature sono già state standardizzate.

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Prevedere il CTR con il Machine Learning in Python

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# Create list of classifiers
names = ['Logistic Regression',  'Decision Tree',
         'Random Forest', 'Multi-Layer Perceptron']
clfs = [LogisticRegression(), 
        DecisionTreeClassifier(), RandomForestClassifier(), 
        MLPClassifier(hidden_layer_sizes = (5, ), max_iter = 40)]

# Fit each classifier and evaluate AUC of ROC curve 
for name, classifier in zip(names, clfs):
  classifier.____(____, ____)
  y_score = classifier.____(X_test)
  y_pred = classifier.____(X_test) 
  prec = ____(____, y_pred, average = 'weighted')
  print("Precision for %s: %s " %(name, prec))

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Questo esercizio fa parte del corso

Prevedere il CTR con il Machine Learning in Python

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Chances are you’re on this page because you clicked a link. In this chapter, you’ll learn why click-through-rates (CTR) are integral to targeted advertising, how to perform basic DataFrame manipulation, and how you can use machine learning models to predict CTR.

Exercise 1: Introduction to click-through rates Exercise 2: Beginning steps Exercise 3: Feature exploration Exercise 4: First evaluation of data Exercise 5: Overview of machine learning models Exercise 6: Logistic regression for breast cancer Exercise 7: Logistic regression for images Exercise 8: A second toy model Exercise 9: CTR prediction using decision trees Exercise 10: Model implementation Exercise 11: A first CTR model Exercise 12: Beyond only accuracy

This chapter provides the foundations for exploratory data analysis (EDA). Using sample data you’ll use the pandas library to look at columns and data types, explore missing data, and use hashing to perform feature engineering on categorical features. All of which are important when exploring features for more accurate CTR prediction.

Exercise 1: Exploratory data analysis Exercise 2: A first look Exercise 3: Checking for missing values Exercise 4: Distributions by CTR Exercise 5: Feature engineering Exercise 6: Analyzing datetime columns Exercise 7: Converting categorical variables Exercise 8: Creating new features Exercise 9: Standardizing features Exercise 10: Log normalization Exercise 11: Understanding standardization Exercise 12: Standard scaling

It’s time to dive deeper. Find out how you can use measures of model performance including precision and recall to answer real-world questions, such as evaluating ROI on ad spend. You’ll also learn ways to improve upon those evaluation metrics, such as ensemble methods and hyperparameter tuning.

Exercise 1: Applications of metric evaluation Exercise 2: Four categories of outcomes Exercise 3: Evaluating four categories Exercise 4: ROI on ad spend Exercise 5: Model evaluation Exercise 6: Precision and recall Exercise 7: Baseline Exercise 8: Classifier comparison Exercise 9: Tuning models Exercise 10: Regularization Exercise 11: Cross validation Exercise 12: Model selection Exercise 13: Ensembles and hyperparameter tuning Exercise 14: Understanding hyperparameter tuning Exercise 15: Random forests Exercise 16: Grid search

Profits can be heavily impacted by your campaign’s CTR. In this chapter, you’ll learn how deep learning can be used to reduce that risk. You’ll focus on multi-layer perceptron (MLP) and neural network models, and learn how these can be used to capture the complex relationship between variables to more accurately predict CTR. Lastly, you’ll explore how to apply the basics of hyperparameter tuning and regularization to classification models.

Exercise 1: Introduzione al deep learning Exercise 2: Capire gli MLP Exercise 3: Modello iniziale Exercise 4: MLP per il CTR Exercise 5: Ottimizzazione degli iperparametri nel deep learning Exercise 6: Ottimizzazione degli iperparametri negli MLP Exercise 7: Variare gli iperparametri Exercise 8: Grid search per MLP Exercise 9: Valutazione del modello Exercise 10: Punteggio F-beta Exercise 11: Bassa precision e AUC alta Exercise 12: Precision, ROI e AUC Exercise 13: Revisione e confronto dei modelli Exercise 14: Riscaldamento al confronto tra modelli Exercise 15: Valutare precision e ROI

Esercizio in corso

Exercise 16: Valutazione completa Exercise 17: Video di riepilogo