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Practical Data Science with Python

Practical Data Science with Python

By : Nathan George
4.8 (19)
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Practical Data Science with Python

Practical Data Science with Python

4.8 (19)
By: Nathan George

Overview of this book

Practical Data Science with Python teaches you core data science concepts, with real-world and realistic examples, and strengthens your grip on the basic as well as advanced principles of data preparation and storage, statistics, probability theory, machine learning, and Python programming, helping you build a solid foundation to gain proficiency in data science. The book starts with an overview of basic Python skills and then introduces foundational data science techniques, followed by a thorough explanation of the Python code needed to execute the techniques. You'll understand the code by working through the examples. The code has been broken down into small chunks (a few lines or a function at a time) to enable thorough discussion. As you progress, you will learn how to perform data analysis while exploring the functionalities of key data science Python packages, including pandas, SciPy, and scikit-learn. Finally, the book covers ethics and privacy concerns in data science and suggests resources for improving data science skills, as well as ways to stay up to date on new data science developments. By the end of the book, you should be able to comfortably use Python for basic data science projects and should have the skills to execute the data science process on any data source.
Table of Contents (30 chapters)
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1
Part I - An Introduction and the Basics
4
Part II - Dealing with Data
10
Part III - Statistics for Data Science
13
Part IV - Machine Learning
21
Part V - Text Analysis and Reporting
24
Part VI - Wrapping Up
28
Other Books You May Enjoy
29
Index

Feature selection

When we are using features to predict a target, some of the features will be more important than others. For example, if we are predicting whether someone will default on a loan, their credit score will be a much better predictor of default than their height and weight. While we can use a large number of features as inputs to ML models, it's much better to minimize the number of features we're using with feature selection methods. ML algorithms take computational power and time to run, and the simpler and more effective we can make the input features, the better. With feature selection, we can screen our inputs for those that have the most promise. These features should have some relationship to the target variable so that we can predict the target with the features. Then we can throw out variables that aren't going to help predict the target.

The curse of dimensionality

Feature selection is related to a concept called "the curse of dimensionality...

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Practical Data Science with Python
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