Guide R
Find the solution to these exercises without using R.
Exercise 1: Which function will I use to know the installed packages?
Answer
The function installed.packages() or, more specifically, names(installed.packages()[,1]).
Exercise 2: Which function will I use to know the loaded packages?
Answer
search()
Exercise 3: How can I load the dplyr package?
Answer
library(dplyr)
Exercise 4: Which function will I use to know the objects that I have created?
Answer
ls()
Exercise 5: How can I remove the sdg object?
Answer
rm(sdg)
Exercise 6: Which function will I use to list the files in my working directory?
Answer
dir()
Exercise 7: Which function will I use to list the files in the “Datasets” folder of my working directory?
Answer
dir("Datasets")
Exercise 8: Which function from which package I will use to read CSV documents?
Answer
The function read_csv() from the package readr.
Exercise 9: Which function from which package I will use to read Excel documents?
Answer
The function read_xlsx() or the function read_xls() from the package readxl.