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Python Data Analysis

You're reading from   Python Data Analysis Perform data collection, data processing, wrangling, visualization, and model building using Python

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Product type Paperback
Published in Feb 2021
Publisher Packt
ISBN-13 9781789955248
Length 478 pages
Edition 3rd Edition
Languages
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Authors (2):
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 Navlani Navlani
Author Profile Icon Navlani
Navlani
Ivan Idris Ivan Idris
Author Profile Icon Ivan Idris
Ivan Idris
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Toc

Table of Contents (20) Chapters Close

Preface 1. Section 1: Foundation for Data Analysis
2. Getting Started with Python Libraries FREE CHAPTER 3. NumPy and pandas 4. Statistics 5. Linear Algebra 6. Section 2: Exploratory Data Analysis and Data Cleaning
7. Data Visualization 8. Retrieving, Processing, and Storing Data 9. Cleaning Messy Data 10. Signal Processing and Time Series 11. Section 3: Deep Dive into Machine Learning
12. Supervised Learning - Regression Analysis 13. Supervised Learning - Classification Techniques 14. Unsupervised Learning - PCA and Clustering 15. Section 4: NLP, Image Analytics, and Parallel Computing
16. Analyzing Textual Data 17. Analyzing Image Data 18. Parallel Computing Using Dask 19. Other Books You May Enjoy

Dask Arrays

A Dask Array is an abstraction of the NumPy n-dimensional array, processed in parallel and partitioned into multiple sub-arrays. These small arrays can be on local or distributed remote machines. Dask Arrays can compute large-sized arraysby utilizing all the available cores in the system. They can be applied to statistics, optimization, bioinformatics, business domains, environmental science, and many more fields. They also support lots of NumPy operations, such as arithmetic and scalar operations, aggregation operations, matrices, and linear algebra operations. However, they do not support unknown shapes. Also, the tolist and sort operations are difficult to perform in parallel. Let's understand how Dask Arrays decompose data into a NumPy array and execute them in parallel by taking a look at the following diagram:

As we can see, there are multiple blocks of different shapes, all of which represent NumPy arrays. These arrays form a Dask Array and can be executed on...

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