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Numerical Computing with Python

You're reading from   Numerical Computing with Python Harness the power of Python to analyze and find hidden patterns in the data

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Product type Course
Published in Dec 2018
Publisher Packt
ISBN-13 9781789953633
Length 682 pages
Edition 1st Edition
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Authors (5):
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Pratap Dangeti Pratap Dangeti
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Pratap Dangeti
Theodore Petrou Theodore Petrou
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Theodore Petrou
Allen Yu Allen Yu
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Allen Yu
Aldrin Yim Aldrin Yim
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Aldrin Yim
Claire Chung Claire Chung
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Claire Chung
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Table of Contents (21) Chapters Close

Title Page
Contributors
About Packt
Preface
1. Journey from Statistics to Machine Learning FREE CHAPTER 2. Tree-Based Machine Learning Models 3. K-Nearest Neighbors and Naive Bayes 4. Unsupervised Learning 5. Reinforcement Learning 6. Hello Plotting World! 7. Visualizing Online Data 8. Visualizing Multivariate Data 9. Adding Interactivity and Animating Plots 10. Selecting Subsets of Data 11. Boolean Indexing 12. Index Alignment 13. Grouping for Aggregation, Filtration, and Transformation 14. Restructuring Data into a Tidy Form 15. Combining Pandas Objects 1. Other Books You May Enjoy Index

Tidying when two or more values are stored in the same cell


Tabular data, by nature, is two-dimensional, and thus, there is a limited amount of information that can be presented in a single cell. As a workaround, you will occasionally see datasets with more than a single value stored in the same cell. Tidy data allows for exactly a single value for each cell. To rectify these situations, you will typically need to parse the string data into multiple columns with the methods from the str Series accessor.

Getting ready...

In this recipe, we examine a dataset that has a column containing multiple different variables in each cell. We use the str accessor to parse these strings into separate columns to tidy the data.

How to do it...

  1. Read in the Texas cities dataset, and identify the variables:
>>> cities = pd.read_csv('data/texas_cities.csv')
>>> cities
  1. The City column looks good and contains exactly one value. The Geolocation column, on the other hand, contains four variables: latitude...
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