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You're reading from  Data Wrangling with R

Product typeBook
Published inFeb 2023
PublisherPackt
ISBN-139781803235400
Edition1st Edition
Concepts
Data Mining
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Author (1)
Gustavo R Santos
Gustavo R Santos
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Gustavo R Santos

Gustavo R Santos has worked in the Technology Industry for 13 years, improving processes, and analyzing datasets and creating dashboards. Since 2020, he has been working as a Data Scientist in the retail industry, wrangling, analyzing, visualizing and modeling data with the most modern tools like R, Python and Databricks. Gustavo also gives lectures from time to time at an online school about Data Science concepts. He has a background in Marketing, is certified as Data Scientist by the Data Science Academy Brazil and pursues his specialist MBA in Data Science at the University of São Paulo
Read more about Gustavo R Santos

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Exercises

  1. What function is used to filter data?
  2. What happens when group_by() is used without the summarizing function?
  3. Write the code to return the capital_gain mean grouped by native_country.
  4. What’s function is used to drop all NAs from a dataset?
  5. Write the code to replace NAs with another value.
  6. Write the code to return the average net gain (capital_gain – capital_loss) by education level, arranged in decreasing order.
  7. What is the main function to be used to create new variables?
  8. List all the types of joins.
  9. What is the difference between left join and inner join?
  10. What are the two functions used to reshape data?
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Data Wrangling with R
Published in: Feb 2023Publisher: PacktISBN-13: 9781803235400
© 2023 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Gustavo R Santos

Gustavo R Santos has worked in the Technology Industry for 13 years, improving processes, and analyzing datasets and creating dashboards. Since 2020, he has been working as a Data Scientist in the retail industry, wrangling, analyzing, visualizing and modeling data with the most modern tools like R, Python and Databricks. Gustavo also gives lectures from time to time at an online school about Data Science concepts. He has a background in Marketing, is certified as Data Scientist by the Data Science Academy Brazil and pursues his specialist MBA in Data Science at the University of São Paulo
Read more about Gustavo R Santos

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