Podcast
Questions and Answers
What function in R is used to combine multiple elements into a vector?
What function in R is used to combine multiple elements into a vector?
- `vector()`
- `concat()`
- `combine()`
- `c()` (correct)
Which function in R creates a sequence of numbers?
Which function in R creates a sequence of numbers?
- `range()`
- `seq()` (correct)
- `sequence()`
- `series()`
How do you read a CSV file into R?
How do you read a CSV file into R?
- `readFile(file)`
- `open.csv(file)`
- `load.csv(file)`
- `read.csv(file)` (correct)
What function is used to install packages in R?
What function is used to install packages in R?
Which function in R returns the structure of an object?
Which function in R returns the structure of an object?
How do you create a data frame in R?
How do you create a data frame in R?
What does the function mean(x, na.rm=TRUE)
do in R?
What does the function mean(x, na.rm=TRUE)
do in R?
How do you check the type of a variable in R?
How do you check the type of a variable in R?
Which function would you use to combine data frames by rows?
Which function would you use to combine data frames by rows?
How can you remove a variable from the workspace in R?
How can you remove a variable from the workspace in R?
Study Notes
R Programming
- The
c()
function is used to combine multiple elements into a vector. - The
seq()
function creates a sequence of numbers. - The
read.csv()
function is used to read a CSV file into R. - The
install.packages()
function is used to install packages in R. - The
str()
function returns the structure of an object. - The
data.frame()
function is used to create a data frame in R. - The
mean(x, na.rm=TRUE)
function calculates the mean ofx
ignoringNA
values. - The
class()
function is used to check the type of a variable in R. - The
rbind()
function is used to combine data frames by rows. - The
rm()
function is used to remove a variable from the workspace in R.
Linux
- The
ls -al
command lists all files, including hidden ones, in a directory. - The
chmod
command is used to change the permissions of a file. - The
cat
command is used to display the contents of a file. - The
grep
command is used to find patterns in files. - The
pwd
command is used to check the current directory you are in. - The
mv
command is used to move or rename a file. - The
mkdir
command is used to create a new directory in Linux. - The
man
command is used to find the manual page for a specific command in Linux. - The
ps
command is used to list all processes currently running.
Git
- The
git init
command is used to initialize a new Git repository. - The
git clone url
command is used to clone a repository from GitHub. - The
git add
command stages changes for the next commit. - The
git log
command is used to view the commit history in Git. - The
git branch new_branch
command creates a new branch in Git. - The
git pull
command fetches and merges changes from the remote repository to the local repository. - The
git rm
command permanently deletes a file from the Git repository and the filesystem. - The
git diff
command is used to see the differences between the working directory and the staging area in Git. - The
git reset --soft HEAD~1
command undoes the last commit while keeping the changes in the working directory. - The
git tag
command is used to create a tag in Git.
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Description
Test your knowledge of basic R programming concepts, including vector operations, sequence generation, and file input/output. Assess your understanding of R functions such as c(), seq(), and read.csv().