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Time Series Analysis with Python Cookbook

Time Series Analysis with Python Cookbook - Second Edition

By : Tarek A. Atwan
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Time Series Analysis with Python Cookbook

Time Series Analysis with Python Cookbook

4 (1)
By: Tarek A. Atwan

Overview of this book

To use time series data to your advantage, you need to master data preparation, analysis, and forecasting. This fully refreshed second edition helps you unlock insights from time series data with new chapters on probabilistic models, signal processing techniques, and new content on transformers. You’ll work with the latest releases of popular libraries like Pandas, Polars, Sktime, stats models, stats forecast, Darts, and Prophet through up-to-date examples. You'll hit the ground running by ingesting time series data from various sources and formats and learn strategies for handling missing data, dealing with time zones and custom business days, and detecting anomalies using intuitive statistical methods. Through detailed instructions, you'll explore forecasting using classical statistical models such as Holt-Winters, SARIMA, and VAR, and learn practical techniques for handling non-stationary data using power transforms, ACF and PACF plots, and decomposing time series data with seasonal patterns. The recipes then level up to cover more advanced topics such as building ML and DL models using TensorFlow and PyTorch and applying probabilistic modeling techniques. In this part, you’ll also be able to evaluate, compare, and optimize models, finishing with a strong command of wrangling data with Python.
Table of Contents (18 chapters)
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Index

Detecting outliers using iForest

iForest has similarities with another popular algorithm known as Random Forests. Random Forests is a tree-based supervised learning algorithm. In supervised learning, you have existing labels (classification) or values (regression) representing the target variable. This is how the algorithm learns (it is supervised).

The name forest stems from the underlying mechanism of how the algorithm works. For example, in classification, the algorithm randomly samples the data to build multiple weak classifiers (smaller decision trees) that collectively make a prediction. In the end, you get a forest of smaller trees (models). This technique outperforms a single complex classifier that may overfit the data. Ensemble learning is the concept of multiple weak learners collaborating to produce an optimal solution.

iForest, also an ensemble learning method, is the unsupervised learning approach to Random Forests. The iForest algorithm isolates anomalies by randomly partitioning...

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