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R Programming Basics: Theory and File Handling

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R Programming Basics: Theory and File Handling

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Questions and Answers

What function in R would you use to combine multiple elements into a vector?

`combine()`

`vector()`

`c()` (correct)

`concat()`

How do you read a CSV file into R?

`open.csv(file)`

`load.csv(file)`

`readFile(file)`

`read.csv(file)` (correct)

What function is used to install packages in R?

`install()`

`load.packages()`

`library()`

`install.packages()` (correct)

Which function in R returns the structure of an object?

<code>str()</code> Signup and view all the answers

How do you create a data frame in R?

<code>data.frame()</code> Signup and view all the answers

Which command lists all files, including hidden ones, in a directory?

<code>ls -al</code> Signup and view all the answers

What is the command to change the permissions of a file?

<code>chmod</code> Signup and view all the answers

How do you display the contents of a file in Linux?

<code>cat</code> Signup and view all the answers

What command is used to find patterns in files?

<code>grep</code> Signup and view all the answers

How do you check the current directory you are in?

<code>pwd</code> Signup and view all the answers

What command do you use to initialize a new Git repository?

<code>git init</code> Signup and view all the answers

How do you clone a repository from GitHub?

<code>git clone url</code> Signup and view all the answers

What command stages changes for the next commit?

<code>git add</code> Signup and view all the answers

How do you view the commit history in Git?

<code>git log</code> Signup and view all the answers

Which command creates a new branch in Git?

<code>git branch new_branch</code> Signup and view all the answers

Study Notes

Basic R Programming

The c() function is used to combine multiple elements into a vector.
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 is used to return the structure of an object.
The data.frame() function is used to create a data frame in R.

Linux

The ls -al command is used to list 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.

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 is used to stage changes for the next commit.
The git log command is used to view the commit history in Git.
The git branch new_branch command is used to create a new branch in Git.

Simple Code Debugging

The provided R code snippet is missing the assignment of data to the data variable, which is required to calculate the mean of a vector.

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Description

Test your knowledge of basic R programming concepts, including vector operations and CSV file handling. Assessment of theoretical questions to evaluate understanding of R fundamentals.