Exercise

Selecting columns

Often it is convenient to work with only a certain column or a subset of columns of a bigger data frame. There are many ways to select columns of data frame in R and you saw one of them in the previous exercise: select() from dplyr*.

dplyr is a popular library for data wrangling. There is also a convenient data wrangling cheatsheet by RStudio to help you get started.

Instructions

100 XP

Access the dplyr library
Create object keep_columns
Use select() (possibly together with one_of()) to create a new data frame learning2014 with the columns named in keep_columns.
Look at the structure of the new dataset

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Instructions

Exercise