Data scientists spend over 60% of their time cleaning and preparing data for analysis. While it’s not the most exciting part of the job, data cleaning is undoubtedly one of the most important skills you need. In this advanced data cleaning course, you’ll learn complex data cleaning techniques using R that will help you to stand from the crowd as a data analyst or data scientist.
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“I tried Udacity, but quickly realized it wasn’t going to work—I didn’t have time during the day to watch full videos. Dataquest’s courses allowed me to advance bit by bit whenever I had a few minutes to spare.”
You’ll learn about regular expressions (regex), a powerful tool that allows you to match and manipulate text data with precision. You’ll also learn to work with JSON data, a common format you’ll encounter when pulling data from web APIs. Then you’ll dive into map and anonymous functions, two intermediate-to-advanced concepts in R that can speed up your data cleaning.
You’ll also learn how to resolve missing values in your data, a critical part of almost every data analysis project. Rather than dropping rows or columns, which reduces the amount of data you have to work with, you’ll learn statistical techniques to impute missing data, and you’ll also learn how to insert data from outside sources.
Best of all, you’ll learn by doing — you’ll practice and get feedback directly in the browser.
Cleaning and manipulating text data using regexUsing map and anonymous functionsResolving missing dataAdvanced techniques for data cleaning Loading lessons...
Dataquest has helped thousands of people start new careers in data. If you put in the work and follow our course, you'll master data skills and grow your career.
We believe so strongly in our courses that we offer a full satisfaction guarantee. If you complete a career course on Dataquest and aren't satisfied with your outcome, we'll give you a refund.
Learn exactly what you need to achieve your goal. Don’t waste time on unrelated lessons.
Build confidence with our in-depth projects, and show off your data skills.
Work with real data from day one with interactive lessons and hands-on exercises.
Impress employers by completing a capstone project and certifying it with an expert review.
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