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R Data Mining

You're reading from   R Data Mining Implement data mining techniques through practical use cases and real-world datasets

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Product type Paperback
Published in Nov 2017
Publisher Packt
ISBN-13 9781787124462
Length 442 pages
Edition 1st Edition
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Author (1):
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Andrea Cirillo Andrea Cirillo
Author Profile Icon Andrea Cirillo
Andrea Cirillo
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Table of Contents (16) Chapters Close

Preface 1. Why to Choose R for Your Data Mining and Where to Start 2. A First Primer on Data Mining Analysing Your Bank Account Data FREE CHAPTER 3. The Data Mining Process - CRISP-DM Methodology 4. Keeping the House Clean – The Data Mining Architecture 5. How to Address a Data Mining Problem – Data Cleaning and Validation 6. Looking into Your Data Eyes – Exploratory Data Analysis 7. Our First Guess – a Linear Regression 8. A Gentle Introduction to Model Performance Evaluation 9. Don't Give up – Power up Your Regression Including Multiple Variables 10. A Different Outlook to Problems with Classification Models 11. The Final Clash – Random Forests and Ensemble Learning 12. Looking for the Culprit – Text Data Mining with R 13. Sharing Your Stories with Your Stakeholders through R Markdown 14. Epilogue
15. Dealing with Dates, Relative Paths and Functions

Developing wordclouds from text

We can make our first attempt to look at these words using the wordcloud package, which basically lets you obtain what you are thinking of: wordclouds.

To create a wordcloud, we just have to call the wordcloud() function, which requires two arguments:

  • words: The words to be plotted
  • frequency: The number of occurrences of each word

Let's do it:

comments_tidy %>%
count(word) %>%
with(wordcloud(word, n))

Reproduced in the plot are all the words stored within the comments_tidy object, with a size proportionate to their frequency. You should also be aware that the position of each word has no particular meaning hear.

What do you think about it? Not too bad, isn't it? Nevertheless, I can see too many irrelevant words, such as we and with. These words do not actually convey any useful information about the content...

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