Set the hyperparameter grid of RF
In this exercise, you'll manually set the grid of hyperparameters that will be used to tune rf
's hyperparameters and find the optimal regressor. For this purpose, you will be constructing a grid of hyperparameters and tune the number of estimators, the maximum number of features used when splitting each node and the minimum number of samples (or fraction) per leaf.
This exercise is part of the course
Machine Learning with Tree-Based Models in Python
Exercise instructions
Define a grid of hyperparameters corresponding to a Python dictionary called
params_rf
with:the key
'n_estimators'
set to a list of values 100, 350, 500the key
'max_features'
set to a list of values 'log2', 'auto', 'sqrt'the key
'min_samples_leaf'
set to a list of values 2, 10, 30
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Define the dictionary 'params_rf'
params_rf = ____