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Data Science Algorithms in a Week

You're reading from   Data Science Algorithms in a Week Top 7 algorithms for scientific computing, data analysis, and machine learning

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Product type Paperback
Published in Oct 2018
Publisher Packt
ISBN-13 9781789806076
Length 214 pages
Edition 2nd Edition
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Authors (2):
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David Toth David Toth
Author Profile Icon David Toth
David Toth
David Natingga David Natingga
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David Natingga
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Toc

Table of Contents (12) Chapters Close

Preface 1. Classification Using K-Nearest Neighbors 2. Naive Bayes FREE CHAPTER 3. Decision Trees 4. Random Forests 5. Clustering into K Clusters 6. Regression 7. Time Series Analysis 8. Python Reference 9. Statistics 10. Glossary of Algorithms and Methods in Data Science
11. Other Books You May Enjoy

Going shopping – dealing with data inconsistencies

We have the following data about the shopping preferences of our friend, Jane:

Temperature

Rain

Shopping

Cold

None

Yes

Warm

None

No

Cold

Strong

Yes

Cold

None

No

Warm

Strong

No

Warm

None

Yes

Cold

None

?

 

We would like to find out, using a decision tree, whether Jane would go shopping if the outside temperature was cold with no rain.

Analysis

Here, we should be careful, as there are instances of the data that have the same values for the same attributes, but different classes; that is, (cold,none,yes) and (cold,none,no). The program we made would form the following decision tree:

    Root
    &...
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