Challenge: Solving Task Using AdaBoost Classifier
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The load_wine dataset is a classic example used for classification tasks. It consists of 178 samples, each representing a different wine cultivar. The dataset comprises 13 numerical attributes that describe various chemical characteristics of the wines, including features like alcohol content, malic acid concentration, and ash content. The target variable consists of three distinct classes representing the three different cultivars.
Your task is to use AdaBoost Classifier to solve the classification problem on the load_wine dataset:
- Split data into train and test sets.
- Use the
AdaBoostClassifier()constructor to create the model with 50 base estimators.
Note
If we don't specify the base model of
AdaBoostClassifer, the Decision Tree Classifier will be used by default.
Løsning
from sklearn.datasets import load_wine
from sklearn.model_selection import train_test_split
from sklearn.ensemble import AdaBoostClassifier
from sklearn.metrics import f1_score
# Load the Wine dataset
data = load_wine()
X = data.data
y = data.target
# Split the data into training and testing sets
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)
# Create and train the AdaBoost Classifier
classifier = AdaBoostClassifier(n_estimators=50)
classifier.fit(X_train, y_train)
# Make predictions
y_pred = classifier.predict(X_test)
# Calculate F1 score
f1 = f1_score(y_test, y_pred, average='weighted')
print(f'F1 Score: {f1:.4f}')
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Sektion 3. Kapitel 2
from sklearn.datasets import load_wine
from sklearn.model_selection import train_test_split
from sklearn.ensemble import AdaBoostClassifier
from sklearn.metrics import f1_score
# Load the Wine dataset
data = load_wine()
X = data.data
y = data.target
# Split the data into training and testing sets
X_train, X_test, y_train, y_test = ___(X, y, test_size=0.2, random_state=42)
# Create and train the AdaBoost Classifier
classifier = ___(___=50)
classifier.fit(X_train, y_train)
# Make predictions
y_pred = classifier.predict(X_test)
# Calculate F1 score
f1 = f1_score(y_test, y_pred, average='weighted')
print(f'F1 Score: {f1:.4f}')
