The Basics of R

What is this an icon of?

• slack.png

• R Project

• R engine

• R Studio

What extension will an R script have?

• .Rscript

• .R

• .Rproj

• .Rmd

Which key autocompletes the existing object or function name when you start typing in R?

• "->"
• Shift
• Tab
• Escape

Which of the following is an absolute local path?

• C:/users/me/Desktop/DigitalMethods/data/SAFI_clean.csv
• data/SAFI_clean.csv
• https://ndownloader.figshare.com/files/11492171
• here/SAFI_clean.csv

Which command below will create a new object called interviews?

• interviews <- c(1,2,3)

• interviews[interviews =="yes"]

• create.dir(interviews)

• interviews <- NULL

What does .Rproj extension denote?

• It is the file extension for Rmarkdown document.

• It designates an R working directory for R session and makes starting new research projects in R easier.

• It is a file that needs to be active for R to work.

• It is the file extension for R script.

What does getwd() do in R?

• Displays the path to your current working directory
• Lists the contents of the current directory
• Sets the working space to the current directory
• Sets the path to the current directory

What is the data type of the 'interviews' object: interviews <- c(1, "a", TRUE, "TRUE")

• Logical

• Numeric

• Character

• Complex

What will the following command rooms[!is.na(rooms)] do?

• Eliminate all missing values from the rooms object
• Extract and display those elements of rooms which contain missing values
• Create a new rooms object without missing values
• Display those elements of rooms object which are not missing values (NAs).

Which of the following are good names for your digital objects in R?

• My_beautiful_object

• My.beautiful.object

• My beautiful object

• My#Beautif$lobj8ct

• MyBeautifulObject