Book Image

Data Science Projects with Python

By : Barbora stetinova
Book Image

Data Science Projects with Python

By: Barbora stetinova

Overview of this book

Data Science Projects with Python is designed to give you practical guidance on industry-standard data analysis and machine learning tools in Python, with the help of realistic data. The course will help you understand how you can use pandas and Matplotlib to critically examine a dataset with summary statistics and graphs and extract the insights you seek to derive. You will continue to build on your knowledge as you learn how to prepare data and feed it to machine learning algorithms, such as regularized logistic regression and random forest, using the scikit-learn package. You’ll discover how to tune the algorithms to provide the best predictions on new and, unseen data. As you delve into later chapters, you’ll be able to understand the working and output of these algorithms and gain insight into not only the predictive capabilities of the models but also their reasons for making these predictions. The codes for this course can be downloaded from https://github.com/TrainingByPackt/Data-Science-Projects-with-Python-eLearning.
Table of Contents (6 chapters)
Chapter 5
Decision Trees and Random Forests
Content Locked
Section 3
Training Decision Trees: Node Impurity
So far, we have treated the decision tree training process as a black box. At this point, you should understand how a decision tree makes predictions using features, and the class fractions of training samples in the leaf nodes. Here are the topics that we will cover now: