Training with bootstrapping

Let's now build a "weak" decision tree classifier and train it on a sample of the training set drawn with replacement. This will help you understand what happens on every iteration of a bagging ensemble.

To take a sample, you'll use pandas' .sample() method, which has a replace parameter. For example, the following line of code samples with replacement from the whole DataFrame df:

df.sample(frac=1.0, replace=True, random_state=42)

Take a sample drawn with replacement (replace=True) from the whole (frac=1.0) training set, X_train.
Build a decision tree classifier using the parameter max_depth = 4.
Fit the model to the sampled training data.

Exercise

Training with bootstrapping

Instructions