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Getting Started with RAn Introduction for Biologists$
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Andrew Beckerman, Dylan Childs, and Owen Petchey

Print publication date: 2017

Print ISBN-13: 9780198787839

Published to Oxford Scholarship Online: March 2017

DOI: 10.1093/acprof:oso/9780198787839.001.0001

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Data Management, Manipulation, and Exploration with dplyr

Data Management, Manipulation, and Exploration with dplyr

Chapter:
(p.57) 3 Data Management, Manipulation, and Exploration with dplyr
Source:
Getting Started with R
Author(s):

Andrew P. Beckerman

Dylan Z. Childs

Owen L. Petchey

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198787839.003.0003

Once your data are in R, you may need to manipulate them. We show you how to refer to columns/variables of your data, how to extract particular subsets of rows, how to make new variables, and how to sort your data. All these are done with functions from the dplyr add-on package, such as select, slice, filter, mutate, transform, arrange, and sort. You then learn how to calculate summary statistics of groups of your data, including the mean and standard deviation. We demonstrate two ways of giving dplyr instructions too, introducing ‘piped’ vs ‘nested’ instructions. Finally, we provide a comparison of between classic ‘base R’ methods and the modern dplyr methods, which is vital for collaboration.

Keywords:   R, dplyr, summary, select, slice, filter, mutate, transform, arrange, sort

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