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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?

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

    How do you create a data frame in R?

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

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

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

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

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

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

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

    What command is used to find patterns in files?

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

    How do you check the current directory you are in?

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

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

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

    How do you clone a repository from GitHub?

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

    What command stages changes for the next commit?

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

    How do you view the commit history in Git?

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

    Which command creates a new branch in Git?

    <p><code>git branch new_branch</code></p> 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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    Related Documents

    Multiple Choice Quiz.pdf

    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.

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