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Machine Learning with Tree-Based Models in Python

4.5+
44 reviews
Intermediate

In this course, you'll learn how to use tree-based models and ensembles for regression and classification using scikit-learn.

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5 Hours15 Videos57 Exercises
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Course Description

Decision trees are supervised learning models used for problems involving classification and regression. Tree models present a high flexibility that comes at a price: on one hand, trees are able to capture complex non-linear relationships; on the other hand, they are prone to memorizing the noise present in a dataset. By aggregating the predictions of trees that are trained differently, ensemble methods take advantage of the flexibility of trees while reducing their tendency to memorize noise. Ensemble methods are used across a variety of fields and have a proven track record of winning many machine learning competitions. In this course, you'll learn how to use Python to train decision trees and tree-based models with the user-friendly scikit-learn machine learning library. You'll understand the advantages and shortcomings of trees and demonstrate how ensembling can alleviate these shortcomings, all while practicing on real-world datasets. Finally, you'll also understand how to tune the most influential hyperparameters in order to get the most out of your models.
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In the following Tracks

Certification Available

Associate Data Scientist in Python

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Machine Learning Scientist with Python

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Supervised Machine Learning in Python

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  1. 1

    Classification and Regression Trees

    Free

    Classification and Regression Trees (CART) are a set of supervised learning models used for problems involving classification and regression. In this chapter, you'll be introduced to the CART algorithm.

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    Decision tree for classification
    50 xp
    Train your first classification tree
    100 xp
    Evaluate the classification tree
    100 xp
    Logistic regression vs classification tree
    100 xp
    Classification tree Learning
    50 xp
    Growing a classification tree
    50 xp
    Using entropy as a criterion
    100 xp
    Entropy vs Gini index
    100 xp
    Decision tree for regression
    50 xp
    Train your first regression tree
    100 xp
    Evaluate the regression tree
    100 xp
    Linear regression vs regression tree
    100 xp
  2. 2

    The Bias-Variance Tradeoff

    The bias-variance tradeoff is one of the fundamental concepts in supervised machine learning. In this chapter, you'll understand how to diagnose the problems of overfitting and underfitting. You'll also be introduced to the concept of ensembling where the predictions of several models are aggregated to produce predictions that are more robust.

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  3. 3

    Bagging and Random Forests

    Bagging is an ensemble method involving training the same algorithm many times using different subsets sampled from the training data. In this chapter, you'll understand how bagging can be used to create a tree ensemble. You'll also learn how the random forests algorithm can lead to further ensemble diversity through randomization at the level of each split in the trees forming the ensemble.

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  4. 4

    Boosting

    Boosting refers to an ensemble method in which several models are trained sequentially with each model learning from the errors of its predecessors. In this chapter, you'll be introduced to the two boosting methods of AdaBoost and Gradient Boosting.

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  5. 5

    Model Tuning

    The hyperparameters of a machine learning model are parameters that are not learned from data. They should be set prior to fitting the model to the training set. In this chapter, you'll learn how to tune the hyperparameters of a tree-based model using grid search cross validation.

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In the following Tracks

Certification Available

Associate Data Scientist in Python

Go To Track

Machine Learning Scientist with Python

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Supervised Machine Learning in Python

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Datasets

Auto-mpgBike Sharing DemandWisconsin Breast CancerIndian Liver Patient

Collaborators

Collaborator's avatar
Kara Woo
Collaborator's avatar
Eunkyung Park
Collaborator's avatar
Sumedh Panchadhar
Elie Kawerk HeadshotElie Kawerk

Senior Data Scientist

Elie is a data scientist with a background in computational quantum physics. His experience encompasses several industries including brick and mortar retail, e-commerce, entertainment, and quick-commerce. He uses a variety of tools and techniques such as machine learning, experimentation, and causal inference to drive business value. His work on a Word2vec-based recommender system has been featured in Amazon Web Service's blog. As a meetup organizer, Elie is passionate about teaching data science and mentoring new-entrants to the field. Elie holds a Phd in physics from Sorbonne University.
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Don’t just take our word for it

*4.5
from 44 reviews
73%
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  • Laerty S.
    27 days

    This course was very important to me because it helped me to understand deeply some concepts that I was thinking that I already knew.

  • Rafael C.
    about 1 month

    Enables you to set up the foundations and then proceeed at a progressively quicker pace.

  • Sue D.
    3 months

    Stunning course with awesome instructor!

  • shankar M.
    4 months

    it is quiet useful program and well structured.

  • Victor E.
    8 months

    Love it. Very practical oriented.

"This course was very important to me because it helped me to understand deeply some concepts that I was thinking that I already knew."

Laerty S.

"Enables you to set up the foundations and then proceeed at a progressively quicker pace."

Rafael C.

"Stunning course with awesome instructor!"

Sue D.

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