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Hands-On Data Science with R

You're reading from  Hands-On Data Science with R

Product type Book
Published in Nov 2018
Publisher Packt
ISBN-13 9781789139402
Pages 420 pages
Edition 1st Edition
Languages
Authors (4):
Vitor Bianchi Lanzetta Vitor Bianchi Lanzetta
Profile icon Vitor Bianchi Lanzetta
Doug Ortiz Doug Ortiz
Profile icon Doug Ortiz
Nataraj Dasgupta Nataraj Dasgupta
Profile icon Nataraj Dasgupta
Ricardo Anjoleto Farias Ricardo Anjoleto Farias
Profile icon Ricardo Anjoleto Farias
View More author details
Toc

Table of Contents (16) Chapters close

Preface 1. Getting Started with Data Science and R 2. Descriptive and Inferential Statistics 3. Data Wrangling with R 4. KDD, Data Mining, and Text Mining 5. Data Analysis with R 6. Machine Learning with R 7. Forecasting and ML App with R 8. Neural Networks and Deep Learning 9. Markovian in R 10. Visualizing Data 11. Going to Production with R 12. Large Scale Data Analytics with Hadoop 13. R on Cloud 14. The Road Ahead 15. Other Books You May Enjoy

Cleaning and transforming data

In Chapter 3, Data Wrangling with R, we approached the topic of data cleaning (munging). Data cleaning is so important that the majority of data scientists spend most of their work time cleaning and preparing data. The last session, What is the R community tweeting about?, gave us a DataFrame with 15999 rows and 42 columns. That is raw data. This session will clean and transform it.

Our initial goal was to check which packages the R community is talking about on Twitter. There are three variables we will use to achieve the final goal.

The variable text can be truncated when there is a retweet. When that is the case, check retweet_text, which won't be truncated. The quoted_text variable also brings useful information. To unite all the useful information into a single object, we can use the following code:

quotes <- tweets_dt$is_quote
rts...
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