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Mastering Predictive Analytics with Python

Mastering Predictive Analytics with Python

By : Joseph Babcock
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Mastering Predictive Analytics with Python

Mastering Predictive Analytics with Python

3 (2)
By: Joseph Babcock

Overview of this book

The volume, diversity, and speed of data available has never been greater. Powerful machine learning methods can unlock the value in this information by finding complex relationships and unanticipated trends. Using the Python programming language, analysts can use these sophisticated methods to build scalable analytic applications to deliver insights that are of tremendous value to their organizations. In Mastering Predictive Analytics with Python, you will learn the process of turning raw data into powerful insights. Through case studies and code examples using popular open-source Python libraries, this book illustrates the complete development process for analytic applications and how to quickly apply these methods to your own data to create robust and scalable prediction services. Covering a wide range of algorithms for classification, regression, clustering, as well as cutting-edge techniques such as deep learning, this book illustrates not only how these methods work, but how to implement them in practice. You will learn to choose the right approach for your problem and how to develop engaging visualizations to bring the insights of predictive modeling to life
Table of Contents (11 chapters)
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Index

Logistic regression


We will start our exploration of classifier algorithms with one of the most commonly used classification models: logistic regression. Logistic regression is similar to the linear regression method discussed in Chapter 4, Connecting the Dots with Models – Regression Methods, with the major difference being that instead of directly computing a linear combination of the inputs, it compresses the output of a linear model through a function that constrains outputs to be in the range [0,1]. As we will see, this is in fact a kind of "generalized linear model that we discussed in the last Chapter 4, Connecting the Dots with Models – Regression Methods, recall that in linear regression, the predicted output is given by:

where Y is the response variable for all n members of a dataset, X is an n by m matrix of m features for each of the n rows of data, and βT is a column vector of m coefficients (Recall that the T operator represents the transpose of a vector or matrix. Here we transpose...

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